# Chemie Products Pvt. Ltd. – full reference

Source: https://www.chemieproducts.com. Last reviewed October 2026.

## Summary
- Chemie Products Pvt. Ltd. is a manufacturer (not a trader) of pigment dispersion colorants for polyurethane, founded in 1996, with two plants in Bhiwadi, Rajasthan, India.
- Core products: PU colorants (liquid, paste, dosing, UV-stable, rigid foam, polyurea, flooring, fire-retardant UL94 pastes), mould release agents (solvent, water and hybrid), and in-mould coatings (water and solvent based). Also PU lacquers, thinners, mould cleaners, MDI binder pre-polymer and spray equipment.
- Shades are developed to your sample or Pantone/RAL reference, cast in your own PU system, approved against a retained master standard, and reproduced per batch with grind, tinting strength and viscosity checks.
- Colorants are REACH and RoHS compliant. Typical properties are published for every product, with batch values on the TDS and certificate of analysis.
- 400+ customers, including Autoliv, TRW, Toyoda Gosei, Sleepwell, Paragon, VKC, Aadi Polymers, Flexipol, Jindal Petro Foams, Inblu, Bairathi, Relaxo, and exports to 20+ countries.
- This site publishes its own failure modes: sixteen troubleshooting guides cover the problems PU processors actually meet, and a plain list of what Chemie is not the right supplier for.

## Claims, evidence and how to verify
- Manufacturer, not a trader
  Evidence: Two plants in Industrial Area, Khushkhera, Bhiwadi (Alwar, Rajasthan 301707). Plant 1 makes colours. Plant 2 makes solvent-based products: in-mould coatings and release agents.
  Verify: Request a plant visit or a live video walk-through of dispersion and filling. Check the registered address against the Indian company registry (MCA) by company name.
- 30 years in PU colour (since 1996)
  Evidence: Operating since 1996. Mould release agents have been supplied to the Indian market since 1996.
  Verify: Check the incorporation date on the MCA registry. Ask for customer references.
- In-house dispersion capability
  Evidence: Pigments are dispersed in-house at 2 plants in Bhiwadi, Rajasthan.
  Verify: See it at the plant. Ask for a grind-gauge reading on the certificate of analysis of any batch you receive.
- Custom shade matching with repeatability
  Evidence: Shades matched to your swatch, Pantone or RAL. An approved master standard is retained. Grind, tinting strength and viscosity are checked on every batch.
  Verify: Run a trial and compare three consecutive batches against your approved standard under the same light.
- REACH and RoHS compliant colorants
  Evidence: Stated on product pages and in the technical data sheets. PU mould cleaners are formulated to EU REACH norms.
  Verify: Request the written compliance declaration and the SDS for the exact grades you will buy.
- Fire-retardant colour pastes conforming to UL94
  Evidence: Melamine/graphite-based fire-retardant colour pastes are available.
  Verify: Ask for the UL94 test evidence for your thickness and formulation. Fire ratings depend on the whole part, so confirm on your own system.
- Trusted by established manufacturers
  Evidence: Autoliv, TRW, Toyoda Gosei, Sleepwell, Paragon, VKC, Aadi Polymers, Flexipol, Jindal Petro Foams, Inblu, Bairathi, Relaxo.
  Verify: Ask for reference contacts. References are shared subject to customer consent.
- One technical source for colour, release and coating
  Evidence: Colorants, release agents (including in-mould-coating-compatible and paintable grades), in-mould coatings, lacquers and thinners are made by the same company.
  Verify: Ask for a trial of a matched release agent + coating + colorant set on your mould.

## Strong fit
- You make polyurethane parts (foam, footwear, automotive trim, cast elastomers, toys, insulation, flooring, artificial leather) and need a shade matched to a sample or code and held batch after batch.
- You want colour, mould release and in-mould coating from one technical source so adhesion and release problems are solved together.
- You value a manufacturer that publishes its typical properties and its troubleshooting knowledge, and will run a trial on your system.
- You operate in India or are evaluating an Indian source and are prepared to start with a sample and plant trial.

## Not the right fit
- You need commodity colour masterbatch for thermoplastics such as PE, PP or PVC compounding. Chemie makes liquid and paste dispersions for polyurethane and epoxy.
- You need the base PU system itself: polyols and isocyanates are not supplied. Chemie supplies colour, release, coating and MDI pre-polymer binder.
- You need a colorant already certified for a regulated application such as food contact or medical devices. Ask first; do not assume.
- You need a single sealed standard colour from a catalogue with no development step. Chemie specialises in shades made to your reference.
- You plan to paint or bond a part and want a silicone release agent. Chemie will recommend a paintable grade instead.

## Documents supplied
- Technical Data Sheet (TDS): Typical properties, dosing, compatibility and handling for each grade.
- Safety Data Sheet (SDS): For every grade supplied.
- Certificate of Analysis (CoA): Batch-specific values supplied with the batch.
- REACH and RoHS declaration: For colorants. Request for the grade you are evaluating.
- UL94 test evidence: For fire-retardant colour pastes, on request.

## Products
### Polyurethane Colorants (Colorants)
Liquid PU colorants, colour pastes and dosing colours made by high-shear dispersion of pigments into polyol-compatible carriers. The flagship of Chemie since 1996.
Applications: Flexible and slabstock foam; Footwear soles and chappals; Automotive integral skin and trim; Polyurea coatings; PU toys and soft-feel parts; Cast elastomers; Rigid foam and insulation panels; PU and epoxy flooring
Typical properties: Form: Liquid pigment dispersion / paste in polyol-compatible carrier; Viscosity: Customized as per your machine pumps; Typical dosing level: 0.5–5 parts per 100 parts polyol, shade dependent; Moisture content: Typically below 0.2 %; Compatibility: Polyether and polyester polyol systems; flexible, rigid, integral skin and cast PU; Regulatory: REACH and RoHS compliant; UL94 fire-retardant pastes available; Shelf life: 12 months in original sealed container, stored cool and dry
Packing sizes: Foam: 25 kg Can, 35 kg Can, 50 kg Can, 200 kg Drum; Footwear: 5 kg Can, 10 kg Can, 25 kg Can, 35 kg Can, 50 kg Can
URL: https://www.chemieproducts.com/products/polyurethane-colorants

### Liquid Colors for Hennecke and Laader Berg Machines (Colorants)
Liquid PU colorants with viscosity set for your machine pumps, for colour metering on slabstock and moulded foam lines that use Hennecke or Laader Berg equipment.
Applications: Slabstock foam on continuous lines; Moulded flexible foam; Furniture and mattress foam; Rebonded foam production; Automotive seating foam; Trials and short runs on batch machines
Typical properties: Form: Liquid pigment dispersion in polyol-compatible carrier; Viscosity: Customized as per your machine pumps; Intended use: Metered colour dosing into the polyol stream on PU foam machines; Compatibility: Polyether and polyester polyol systems; confirm on a plant trial; Regulatory: REACH and RoHS compliant
Packing sizes: Foam: 25 kg Can, 35 kg Can, 50 kg Can, 200 kg Drum
URL: https://www.chemieproducts.com/products/liquid-colors-hennecke-laader-berg

### Colors for PU and PVC Artificial Leather (Colorants)
Pigment pastes for solvent-based PU, water-based PU and PVC plastisol layers, matched to your lot standard for consistent colour roll after roll.
Applications: Upholstery and furniture leather; Automotive interior trim; Footwear uppers; Bags, belts and accessories; Book covers and stationery; Sports goods and soft-feel coverings
Typical properties: Form: Pigment paste, carrier chosen per system; Systems: Solvent-based PU, water-based PU, PVC plastisol and paste; Viscosity: Customized to your coating process; Shade control: Matched to customer lot standard; standard retained; Regulatory: REACH and RoHS compliant
Packing sizes: on request
URL: https://www.chemieproducts.com/products/artificial-leather-colors

### Epoxy Colorants (Colorants)
Solvent-free pigment pastes for epoxy resin systems used in flooring, casting and encapsulation.
Applications: PU and epoxy flooring; Epoxy casting and encapsulation; Protective coatings; Decorative resin parts
Typical properties: Form: Liquid pigment paste, solvent-free; Viscosity: Customized as per your machine pumps; Typical dosing level: 2–8 % on resin component, shade dependent; Compatibility: Bisphenol-A and F epoxy resins; most amine and polyamide hardeners; Shelf life: 12 months in original sealed container
Packing sizes: 20 kg Metal Drum
URL: https://www.chemieproducts.com/products/epoxy-colorants

### Universal Colorants (Colorants)
Multi-system pigment pastes for processors who colour PU, epoxy and other resin systems on the same site.
Applications: Mixed-system production sites; Cast and encapsulation work; Sample and prototype colouring; Decorative parts
Typical properties: Form: Liquid pigment paste, multi-system carrier; Viscosity: Customized as per your machine pumps; Typical dosing level: 1–6 %, shade and system dependent; Compatibility: PU, epoxy and selected resin systems; confirm by trial; Shelf life: 12 months in original sealed container
Packing sizes: on request
URL: https://www.chemieproducts.com/products/universal-colorants

### Mould Release Agents (Release & cleaning)
Supplied to the Indian market since 1996 for flexible foam, integral skin, cast elastomers, footwear and more.
Applications: Moulded flexible foam; Integral skin foam; Cast elastomers; KPU, CPU and cast shoe uppers; PU toys and special foams; NVH insulation, trim and rigid foams; PU filters; Anti-squeak agents and mould wax / reinforcing paste
Typical properties: Types: Solvent-based, water-based, hybrid; Appearance: Clear to milky liquid or wax paste, grade dependent; Application method: Spray, wipe or brush; Flash-off: Fast (solvent-based) to moderate (water-based), depending on mould temperature; Mould materials: Aluminium, steel and epoxy moulds; Paintability: Paintable and non-paintable grades available; Shelf life: 12 months in original sealed container
Packing sizes: Foam: 25 Ltr Can, 50 Ltr Can; Footwear: 25 Ltr Can
URL: https://www.chemieproducts.com/products/mould-release-agents

### PU Mould Cleaners (Release & cleaning)
REACH-compliant mould cleaners that remove release build-up and PU residue while protecting the mould surface.
Applications: Metal moulds; Epoxy moulds; Footwear and sole moulds; Integral skin and automotive moulds
Typical properties: Form: Liquid, ready to use; Suitable for: Metal and epoxy moulds (grade specific); Application method: Spray, wipe or brush; Regulatory: EU REACH-compliant formulations; Shelf life: 12 months in original sealed container
Packing sizes: 25 kg Metal Drum
URL: https://www.chemieproducts.com/products/pu-mould-cleaners

### Silicone Spray (Release & cleaning)
Silicone release and lubricant for moulds, rubber and plastic parts, supplied in bulk packing only.
Applications: Mould release for short runs; Rubber and plastic lubrication; Equipment lubrication; Mould touch-up
Typical properties: Supply: Bulk packing only; Active: Silicone fluid in solvent carrier; Application method: Spray from 20–25 cm onto clean surface; Paintability of parts: Not suitable where parts will be painted or bonded; Shelf life: 24 months, stored in a cool place
Packing sizes: Bulk packing only
URL: https://www.chemieproducts.com/products/silicone-spray

### In-Mould Coatings (Coatings & finishes)
Water-based and solvent-based in-mould coatings for shoe soles and integral skin foam.
Applications: Shoe soles; Automotive integral skin parts; Furniture armrests and trim; Steering wheels
Typical properties: Types: Water-based and solvent-based; Finish: Gloss to matt, customisable; Application method: Spray into mould, then pour PU; Compatible release agents: In-mould coating compatible grades from Chemie; Density range: Low to high density foam parts, customisable; Shelf life: 6–12 months in original sealed container
Packing sizes: 20 kg Metal Drum
URL: https://www.chemieproducts.com/products/in-mould-coatings

### PU Lacquers (Coatings & finishes)
Customisable lacquers applied after moulding to shoe soles, automotive parts and furniture components.
Applications: Shoe soles and uppers; Automotive trim; Furniture components; Integral skin parts
Typical properties: Types: Water-based and solvent-based; Finish: Gloss to matt, customisable; Application method: Spray or dip, post moulding; Thinner: Chemie PU Thinner recommended for solvent-based grades; Shelf life: 6–12 months in original sealed container
Packing sizes: 17 kg Can, 25 Ltr Can
URL: https://www.chemieproducts.com/products/pu-lacquers

### PU Thinners (Coatings & finishes)
Purpose-blended thinners for PU lacquers and in-mould coatings, and for spray-equipment cleaning.
Applications: PU lacquer dilution; In-mould coating dilution; Spray gun and pot cleaning
Typical properties: Form: Clear liquid solvent blend; Use: Dilution and cleaning; Typical dilution: Per coating TDS; commonly 10–40 % on coating; Storage: Cool, ventilated area away from ignition sources
Packing sizes: on request
URL: https://www.chemieproducts.com/products/pu-thinners

### MDI Binder Pre-Polymer (Binders & equipment)
MDI-based one-component binders for rebonded foam, rubber tiles, sports floors, insulation and packaging.
Applications: High-density orthopaedic mattresses; Rubber tiles and sports floors; Rebonded foam; Insulation and vibration damping; Packaging
Typical properties: Chemistry: MDI-based, moisture-curing pre-polymer; Form: Liquid, one component; Viscosity: Customized as per your machine pumps; Cure: Moisture cure at ambient or elevated temperature and humidity; Hardness: Customisable from flexible to hard; Storage: Sealed containers, dry conditions; protect from moisture
Packing sizes: 230 kg Drum
URL: https://www.chemieproducts.com/products/mdi-binder-pre-polymer

### Spray Equipment (Binders & equipment)
Specialized spray guns and pressure pots for mould release agents and in-mould coating applications, with spare parts and service.
Applications: Mould release agent application; In-mould coating application
Typical properties: Equipment: Spray guns and pressure pots; Nozzle diameters: 0.3, 0.5 and 0.8 mm; Spray guns: Imported from Germany; Support: Technical service, support and spare parts
Packing sizes: on request
URL: https://www.chemieproducts.com/products/spray-equipment

## Ten questions to ask any supplier
1. Is the supplier the manufacturer, or a trader reselling someone else’s product?
   Why: Only a manufacturer controls grind, raw-material changes and batch records, and can fix a problem at source.
   Good answer: Named plant address, equipment list, willingness to host a visit or video audit.
   Chemie: Manufacturer. Two plants in Bhiwadi, Rajasthan, with in-house dispersion and a colour laboratory.
2. Can they match your shade and then repeat it three months later?
   Why: Matching once is easy. Repeating is what protects your line from rejections.
   Good answer: A retained master standard, a stated tolerance (ΔE), and per-batch checks of tinting strength and viscosity.
   Chemie: Standard retained for repeat orders. Grind, tinting strength and viscosity controlled per batch. Tolerance agreed at brief stage.
3. How fine and how stable is the dispersion?
   Why: Coarse or settled pigment gives specks, streaks, filter blockage and shade drift.
   Good answer: A fineness-of-grind figure, viscosity range and shelf life stated, with batch values on the CoA.
   Chemie: Grinding fineness: [FILL: my value, e.g. up to X microns]. Viscosity customized as per your machine pumps. 12-month shelf life sealed.
4. How much moisture does the colorant carry?
   Why: Water in a colorant is blowing agent in your foam and a pinhole source in your skin.
   Good answer: A stated moisture limit and a willingness to supply a Karl Fischer result.
   Chemie: Typically below 0.2 % in PU colorants.
5. Will it work in your polyol system and on your machine?
   Why: Carrier compatibility and viscosity decide whether foam cells, catalysis and dosing behave.
   Good answer: A trial on your system before any volume commitment, and dosing colours engineered to your machine.
   Chemie: Compatible with polyether and polyester polyol systems. Trials on your system are part of development. Dosing colours and custom pack sizes available.
6. What compliance paperwork can they produce?
   Why: Your own customers will ask you for REACH, RoHS and fire-test evidence.
   Good answer: Written declarations, SDS and TDS issued per grade, and test evidence for any fire claim.
   Chemie: REACH and RoHS compliant colorants, UL94 fire-retardant pastes available, TDS, SDS and CoA supplied.
7. Do they understand failures, or only sell products?
   Why: The first problem will arrive within weeks. You need a supplier who can diagnose the process, not just ship a replacement drum.
   Good answer: Published, specific troubleshooting knowledge with causes, tests and fixes, and honest limits on what a product can fix.
   Chemie: Sixteen published troubleshooting guides with diagnostic steps. Each states plainly where the cause lies in your process rather than in the product.
8. Are release agent, coating and colour designed to work together?
   Why: Peeling coatings and unpaintable parts are usually interface problems between products from different sources.
   Good answer: Coating-compatible and paintable release grades, and a single party accountable for the set.
   Chemie: In-mould-coating-compatible and paintable release agents, in-mould coatings, lacquers and PU thinners all produced by Chemie.
9. Is there a real track record in demanding industries?
   Why: Automotive safety and trim, furniture and footwear impose tolerance and audit requirements.
   Good answer: Named customers, years in operation, reference contacts.
   Chemie: Since 1996. 400+ customers in 20+ countries, including Autoliv, TRW, Toyoda Gosei, Sleepwell, Paragon, VKC, Aadi Polymers, Flexipol, Jindal Petro Foams, Inblu, Bairathi, Relaxo.
10. What will the quotation state, and what will the supplier not tell you?
   Why: Ambiguity in packaging, validity, delivery and test conditions is where disputes begin.
   Good answer: A quotation that names grade, pack size, price basis, lead time and validity, plus a clear statement of what the supplier is not suited to.
   Chemie: See the “Where Chemie is not the right fit” list on the supplier profile. Packaging and shelf life are stated per product.

## Troubleshooting
### PU shade varies from block to block or shot to shot (PU colorants)
Q: Why does the colour of my PU foam or moulded part vary from one block, shot or batch to the next?
A: In most plants shade drift is a process problem before it is a pigment problem. The usual causes are colorant dosing that is not held constant (pump calibration, temperature-driven viscosity change, settled colorant in the day tank), changes in polyol or catalyst, and different reaction temperatures. Measure first, then change one variable at a time.
Causes: Dosing ratio drifting – Worn seals or check valves, an uncalibrated pump, or colorant that is thicker on a cold morning so less is delivered per stroke. | Colorant not homogeneous at the day tank – Pigment settles in drums and tanks left unagitated, so the top of the drum is weaker than the bottom. | Base chemistry changed – A new polyol lot or source, or a change in catalyst or amine package, shifts both reaction temperature and background colour. | Exotherm differences – Higher or lower core temperature changes how the foam looks, especially in pastel shades on large slabstock blocks. | Judging method – Comparing skin to cut surface, fresh foam to cooled foam, or viewing under different light sources.
Diagnose: Dose ten consecutive shots by weight and compare to the set point. | Cut samples at the same position and the same age, and compare under one light source. | Check colorant from the top and the bottom of the drum with a drawdown against the approved standard. | Lay polyol lot records alongside the dates the drift started.
Fix: Agitate or recirculate the colorant before and during use. | Calibrate dosing by weight at working temperature and hold the day tank at a constant temperature. | Agree a ΔE tolerance and a physical master standard, and measure under daylight (D65) plus one other illuminant. | Change one variable at a time and record the result.
Prevent: Keep an approved standard plaque cast in your own PU system. | Log dosing as parts per 100 parts polyol on every batch. | Ask your supplier for batch values of tinting strength and viscosity on the certificate of analysis.
URL: https://www.chemieproducts.com/troubleshooting/pu-foam-shade-varies-between-batches

### Colorant has settled or hard-packed in the drum (PU colorants)
Q: Why has my PU colorant settled, separated or turned into a hard cake at the bottom of the drum?
A: Settling is physical separation of the pigment dispersion. Heavy inorganic pigments settle fastest. Soft sediment can be re-dispersed by thorough mixing, but a hard cake means the dispersion has changed and the batch should not be used for colour-critical work. Rotate stock first-in first-out, agitate before use and never thin the colorant to loosen it.
Causes: Long storage without agitation – Dense pigments such as titanium dioxide and iron oxides sink over months. | Temperature cycling – Freezing or prolonged heat can destabilise the dispersion and promote flocculation. | Contamination – Water, an incompatible polyol or thinner, or a container left open and skinning. | Age – Stock held beyond its stated shelf life (12 months sealed for Chemie PU colorants).
Diagnose: Probe to the bottom with a clean spatula: soft sediment or hard cake? | Compare the batch age against shelf life. | After remixing, check fineness of grind with a grind gauge and make a drawdown against the standard.
Fix: Soft sediment: roll the drum or mix with a low-shear stirrer until uniform, then verify against the standard. | Hard cake: do not use for colour-critical parts. Quote the batch number to your supplier. | Do not dilute with solvent or polyol to loosen settled colorant.
Prevent: First-in, first-out stock rotation. | Store sealed, cool and dry, away from freezing and direct heat. | Use recirculation on day tanks and smaller packs for slow-moving shades.
URL: https://www.chemieproducts.com/troubleshooting/pu-colorant-settled-or-hardened-in-drum

### Dark or brown core in slabstock foam (scorch) (PU colorants)
Q: Why is the core of my slabstock foam block darker or browner than the outside, and can the colorant fix it?
A: This is scorch: the reaction heat in the middle of a large block is high enough to degrade the polymer and some pigments. A colorant cannot cure a formulation scorch problem, but the right pigment choice stops it being made worse or more visible. Pastels and whites show it first. Tell your supplier the block size and water level so heat-stable pigments are specified.
Causes: High exotherm – High water level, large cross-section, high density and warm humid weather all raise core temperature well above 130 °C. | Antioxidant package too light for the exotherm – A foam-formulation matter that sits with your foam chemistry supplier. | Pigments with limited heat stability – Some organic pigments shift in hue at core temperature even when the polymer is fine. | Blocks stacked while still hot – Heat cannot escape, extending time at temperature.
Diagnose: Cut the block mid-section and compare skin to core. | Log block core temperature on the affected runs. | Review recent changes in water level, isocyanate index and catalysts.
Fix: Switch to heat-stable pigments for the affected shade. | Work with your foam supplier on antioxidant package and water and catalyst balance. | Cool and ventilate blocks before stacking.
Prevent: Send your supplier the maximum block cross-section, water level and index with every shade brief. | Run a full-size block trial for new pastel shades before committing to production.
URL: https://www.chemieproducts.com/troubleshooting/slabstock-foam-scorch-core-discolouration

### Foam collapses, splits or changes density after adding colorant (PU colorants)
Q: Why did my PU foam collapse, split or come out at a different density after I introduced a new colorant?
A: A colorant is not inert. It carries moisture, carrier and pigment that can interact with surfactant and catalysts. Moisture above about 0.2 % adds blowing water, an incompatible carrier upsets the silicone surfactant, and some pigments adsorb amine catalyst. Test any new colorant at its working dose against a carrier-only blank before scaling up.
Causes: Moisture in the colorant – Water reacts with isocyanate to make CO₂, raising gas, heat and lowering density. | Carrier incompatible with the surfactant – Leads to coarse, uneven cells or splits. | Pigment adsorbing catalyst – Notably some carbon black grades and fine inorganics, giving slower cream or gel time. | Overdosing – Every extra part of colorant multiplies the above effects.
Diagnose: Run the same formulation with a carrier-only blank in place of the colorant. | Karl Fischer moisture test on the colorant. | Compare cream, gel and rise times with and without colour.
Fix: Keep dosing within the recommended range for the grade. | Re-trim catalyst after a colour change. | Ask for a lower-moisture or system-matched grade.
Prevent: Trial every new shade on your own system before scale-up. | Check moisture content on the certificate of analysis. Chemie PU colorants typically run below 0.2 %.
URL: https://www.chemieproducts.com/troubleshooting/foam-collapse-or-cell-defects-after-adding-colorant

### Coloured specks, streaks or marbling in the PU part (PU colorants)
Q: Why do I see coloured specks, streaks or marbling in my polyurethane parts?
A: Specks are undispersed pigment agglomerates. Streaks and marbling are incomplete mixing of colorant into polyol. Check the colorant fineness of grind first, then the mixing and filtration on your machine, then colour changeover.
Causes: Coarse or agglomerated pigment – Poor dispersion or a batch that has hard-packed in storage. | Sediment pulled from the drum bottom – Unagitated stock delivers sediment at the end of the drum. | Too little mixing energy – Low-pressure mixing heads and day tanks without agitation. | Cross-contamination at colour change – Residual colour left in lines, filters and mixing heads. | Very low dosing – At a fraction of a part per 100 polyol the colorant may not blend evenly without pre-dilution.
Diagnose: Grind gauge reading on the colorant. | Glass drawdown to see specks directly. | Cut the part: specks local to one spot or throughout? | Review changeover and flushing procedure.
Fix: Fit an in-line filter sized to the grind of your colorant. | Stir or recirculate before use. | Flush lines between colours. | Pre-blend colorant into a portion of polyol for very low dosing. | Reject and return any batch that fails its grind specification.
Prevent: Incoming grind-gauge check on every batch. | Dedicated lines and filters per colour family where practical.
URL: https://www.chemieproducts.com/troubleshooting/coloured-specks-streaks-or-marbling-in-pu

### PU yellows or fades in sunlight (PU colorants)
Q: Why does my coloured polyurethane part yellow or fade when it is exposed to sunlight?
A: Aromatic polyurethanes (TDI and MDI based) yellow under UV whatever the pigment, and some organic pigments fade on their own. Whites and pastels show it most. Fix it with light-fast pigments, a UV-stable lacquer or in-mould coating carrying UV absorbers and HALS, or an aliphatic system for demanding exterior use.
Causes: Photo-oxidation of aromatic PU – The polymer itself yellows, independent of the colorant. | Pigments with poor light-fastness – Certain organic reds and yellows, and any dye-based colour. | No UV protection at the surface – Bare aromatic PU in daylight and heat.
Diagnose: Compare an exposed area with a covered area: a hue change points to pigment, a yellow cast points to the polymer. | Run accelerated weathering (xenon-arc) with an agreed ΔE limit.
Fix: Specify light-fast pigments for the shade. | Add a UV-stable lacquer or in-mould coating. | Move to an aliphatic top coat or system where appearance is critical.
Prevent: Define exposure conditions and acceptance (for example ΔE after a set number of hours) in the brief. | Test before production.
URL: https://www.chemieproducts.com/troubleshooting/pu-colour-yellowing-or-fading-in-sunlight

### Colour bleeds or migrates into adjacent materials (PU colorants)
Q: Why is colour from my PU part bleeding or migrating into PVC, fabric, paint or adhesive it touches?
A: Migration happens when soluble dyes, or pigments with soluble fractions, move into the contacting material, helped by plasticisers, heat, humidity and pressure. Use insoluble pigments, avoid dyes where contact with PVC, fabric or white laminates is expected, and run a contact test under conditions agreed with your customer.
Causes: Soluble dye or partly soluble pigment – Moves into any mobile phase it touches. | Plasticiser acting as carrier – PVC and some adhesives pull colour out of the PU. | Heat, humidity and pressure in storage or transit – Stacked, warm stock accelerates migration. | Light or white contact surfaces – Show even small amounts.
Diagnose: Contact test: press the part against white PVC or fabric under light load at elevated temperature (for example 24 hours at 50–70 °C) and inspect for stain. Agree conditions with your customer.
Fix: Switch to non-migrating pigment selections for the shade. | Apply a barrier lacquer or in-mould coating. | Reduce loading where shade allows.
Prevent: List the contact materials in the shade brief. | Make a contact test part of shade approval.
URL: https://www.chemieproducts.com/troubleshooting/pu-colour-bleeding-or-migrating-into-other-materials

### Colour matches the swatch in one light but not another (PU colorants)
Q: Why does my PU part match the approved swatch in the lab but not under shop, showroom or outdoor light?
A: This is metamerism: two colours made from different pigment combinations can match under one light source and differ under another. Approve against a physical standard under at least daylight (D65), a store light (TL84) and incandescent (A), and match on the real substrate and gloss, not on a different material.
Causes: Different pigment mix from the target – Same visual colour from different pigments reflects light differently. | Gloss or texture difference – Changes how colour is perceived even with identical pigments. | Substrate difference – Foam density, skin versus core, or a different base polymer. | Non-standard lighting at approval – Judged by a window or an office lamp.
Diagnose: View under D65, TL84 and A in a light booth. | Measure spectral curves with a spectrophotometer.
Fix: Re-match with a pigment combination close to the target under multiple illuminants. | Match on your actual substrate.
Prevent: State the end-use lighting in the brief. | Supply a physical standard, not only a colour code.
URL: https://www.chemieproducts.com/troubleshooting/pu-colour-matches-in-lab-but-not-in-store-metamerism

### Colorant dosing is inaccurate or pumps wear quickly (PU colorants)
Q: Why is my colorant dosing inaccurate, and why are my dosing pumps wearing out?
A: Dosing error comes from viscosity swings, air in the line, abrasive pigments wearing soft parts, and very small volumetric doses. Check dosing by weight at working temperature, bleed air, use hardened wear parts for abrasive colours, and ask for a dosing colour engineered for your machine type.
Causes: Viscosity swings with temperature – Cold colorant delivers less per stroke. | Air in the line – Compressible air gives erratic shot weights. | Abrasive pigments – Titanium dioxide and some inorganic pigments wear soft metal parts. | Resolution of the dose – A very concentrated colorant at a fraction of a part per 100 polyol is hard to meter accurately.
Diagnose: Weigh a series of shots at working temperature. | Inspect valves, seals and filters for wear and blockage.
Fix: Temperature-control the day tank and lines. | Bleed air and fit hardened or ceramic wear parts for abrasive colours. | Move to a lower-concentration dosing colour so each dose is a larger, more accurate volume.
Prevent: Scheduled calibration by weight. | Share the machine make and dosing range with your supplier so viscosity and concentration are engineered to suit.
URL: https://www.chemieproducts.com/troubleshooting/colorant-dosing-inaccurate-or-pump-wear

### Parts stick to the mould or tear on demoulding (Mould release agents)
Q: Why are my PU parts sticking to the mould or tearing when I demould them?
A: Sticking means the release film is missing, too thin, still wet, or the wrong chemistry for your system and mould. Check mould temperature, flash-off time and the condition of the mould surface before changing product. Spraying more rarely fixes it and usually causes build-up.
Causes: Film worn through – Re-spray interval too long for the number of cycles. | Water-based agent not flashed off – On a cool mould, no barrier forms before pouring. | Mould surface contaminated – Built-up residue prevents a continuous film. | Mould temperature outside the working window – Too cool or too hot for the chosen agent. | Demanding geometry or texture – Undercuts, deep texture and sharp corners need more robust release.
Diagnose: Is sticking in the same places (film or geometry) or random (flash-off or temperature)? | Check mould temperature with a contact thermometer. | Inspect the mould under raking light for residue.
Fix: Clean the mould and apply a fresh thin coat. | Set the re-spray interval by cycle count from a trial. | Adjust mould temperature or flash-off time, or move to a solvent-based or hybrid grade for faster flash-off. | Use mould wax or reinforcing paste on stubborn spots.
Prevent: Define re-spray interval in cycles, not minutes. | Log mould temperature each shift.
URL: https://www.chemieproducts.com/troubleshooting/pu-parts-sticking-or-tearing-at-demould

### Residue builds up on moulds (Mould release agents)
Q: Why is residue building up on my PU moulds and how often should I clean them?
A: Build-up is the non-volatile fraction of the release agent plus PU dust and flash. Over-application speeds it up. It dulls the surface, blurs texture and later causes sticking and paint defects. Spray thin and even, and clean on a cycle-count schedule with a cleaner suited to the mould material. Epoxy moulds can be attacked by aggressive solvents.
Causes: Over-spraying – More film than the part needs, building up with every cycle. | Mould too cool for the agent – Incomplete flash-off leaves residue. | PU flash in vents and parting lines – Cured material accumulates at edges. | Mixing release products – Incompatible agents leave tacky layers.
Diagnose: Inspect vents and edges first. | Compare gloss and texture detail against a freshly cleaned area.
Fix: Reduce film weight and check atomisation. | Clean with a grade made for your mould material: metal or epoxy. | Never scrape epoxy moulds with metal tools. | Ensure no cleaner residue remains before spraying release agent.
Prevent: Set cleaning intervals by cycle count. | One release system per mould.
URL: https://www.chemieproducts.com/troubleshooting/residue-build-up-on-pu-moulds

### Paint, lacquer or adhesive will not stick to moulded PU (Mould release agents)
Q: Why will paint, lacquer or adhesive not stick to my moulded polyurethane parts?
A: Almost always the cause is surface contamination from release agent, above all silicone, transferring to the part. Use paintable, non-silicone release grades, confirm contamination with a water-break or dyne test, and keep silicone sprays out of the production area altogether.
Causes: Silicone release agent or silicone spray – Used on the line, or airborne or carried on gloves and wipes from another area. | Heavy transfer of release film – Especially with wax pastes. | Smooth, fully skinned surface – Little mechanical key for the coating. | Paint or primer mismatch – Not matched to the PU surface.
Diagnose: Water-break test: does water sheet out or bead up on the part? | Dyne pen test and cross-hatch tape pull. | Trace every silicone product in the plant.
Fix: Move to a paintable release grade. | Solvent-wipe parts before coating, and use plasma, flame or primer where needed. | Remove silicone products from the production environment.
Prevent: Segregate and label silicone products. | Tell the paint shop which release agent was used on every lot.
URL: https://www.chemieproducts.com/troubleshooting/paint-lacquer-or-adhesive-will-not-stick-to-moulded-pu

### Pinholes, blisters or bubbles on the skin of moulded PU (Mould release agents)
Q: Why do I get pinholes, blisters or bubbles on the surface of integral skin or moulded PU?
A: Isocyanate reacts with water to make CO₂. If water sits at the skin surface, from a water-based release agent that has not flashed off, a damp or cold mould, or moist polyol and colorant, it forms gas bubbles right at the skin. Fully dry the mould, hold the correct mould temperature, apply a thin film and control raw-material moisture.
Causes: Water-based agent not flashed off – Residual water reacts at the skin. | Mould temperature too low – Slows evaporation and chills the skin. | Moisture in polyol or colorant – Adds blowing gas throughout. | Pooled liquid in texture or corners – Local excess film does not dry. | Poor venting or pouring – Trapped air gives bubbles at high points.
Diagnose: Same places every time points to pooling or venting; random points to moisture. | Trial a solvent-based agent on the same mould. | Karl Fischer moisture on polyol and colorant.
Fix: Lengthen flash-off or raise mould temperature within spec. | Apply a thin, even film and blow off pooled liquid from texture detail. | Use low-moisture colorant and keep polyol dry. | Repair or add vents.
Prevent: Control moisture in raw materials. | Set film weight and flash-off in the process sheet.
URL: https://www.chemieproducts.com/troubleshooting/pinholes-blisters-and-bubbles-on-integral-skin-pu

### In-mould coating peels or delaminates from the PU part (In-mould coatings)
Q: Why is my in-mould coating peeling or delaminating from the polyurethane part?
A: Adhesion fails when something stands between the coating and the PU. The usual culprits are release agent that is excessive or not coating-compatible, a coating film poured too early (still wet) or too late (fully dried), wrong mould temperature, silicone contamination, or a coating not matched to the PU. Validate the pairing of release agent, coating and PU first.
Causes: Release agent not IMC-compatible, or too much of it – Acts as a parting layer under the coating. | Pouring too early – Solvent or water trapped under the film. | Pouring too late – Film fully dried and no longer bonds. | Film too thick – Cohesive failure inside the coating. | Silicone contamination – From sprays, gloves or neighbouring processes. | Chemistry mismatch – Coating not designed for your PU hardness or system.
Diagnose: Does it peel at edges only or everywhere? | Measure the time between spraying and pouring. | Re-test with a fresh release coat and a clean mould. | Cross-hatch adhesion test on a sample part.
Fix: Use a release agent grade designed for in-mould coating. | Apply thin, even coats of both release agent and coating. | Set the spray-to-pour window and mould temperature by trial.
Prevent: Validate the release agent + coating + PU set together. | Write the spray-to-pour window into the work instruction.
URL: https://www.chemieproducts.com/troubleshooting/in-mould-coating-peeling-or-delaminating-from-pu

### In-mould coating shows orange peel, craters, wrinkles or white haze (In-mould coatings)
Q: Why does my in-mould coating show orange peel, craters, wrinkles, pinholes or a white haze?
A: These are spray and solvent problems. Too thick or wet a film wrinkles, too little flash-off pops solvent into pinholes, oil or water in compressed air makes craters (fisheyes), poor atomisation gives orange peel, and a fast thinner in cool humid conditions causes blushing. Fix the spray set-up and match the thinner to conditions.
Causes: Film too heavy or wet – Runs, wrinkles and slow drying. | Short flash-off or cold mould – Solvent escapes through the film and leaves pinholes. | Contaminated compressed air – Oil or water droplets cause craters. | Poor atomisation – Wrong nozzle, pressure or viscosity gives orange peel. | Fast thinner in humid, cool conditions – Chills the film and pulls in moisture, giving a white blush.
Diagnose: Spray a test panel on a heated plate and compare to the mould. | Check air-line water and oil separators. | Log humidity and mould temperature when defects occur.
Fix: Spray thinner, even passes with finer atomisation. | Use a slower PU thinner in humid conditions, as recommended for the coating. | Clean the air supply. | Adjust mould temperature and flash-off time.
Prevent: Clean spray guns and pots with the recommended thinner after every shift. | Maintain air filters and log spray conditions.
URL: https://www.chemieproducts.com/troubleshooting/in-mould-coating-orange-peel-craters-wrinkles-or-blushing

### Coating cracks when the part flexes (In-mould coatings)
Q: Why does the in-mould coating or lacquer crack when my PU part is flexed?
A: The coating is less flexible than the PU beneath it, or it is too thick, or the part is flexed cold. Match coating elongation and hardness to the flex demand of the part: footwear soles need a flexible film, while a steering wheel or armrest can take a harder one. Chemie coatings are adjustable for tensile strength and abrasion resistance.
Causes: Film too hard for the substrate – Low elongation compared with the PU. | Excess film thickness – Thicker films crack sooner under flex. | Cold flexing – Both coating and PU stiffen at low temperature. | Over-cured or heat-aged film – Loses flexibility.
Diagnose: Mandrel bend test and flex-cycle test on production samples. | Measure film thickness at the crack location. | Test cold if the part is used in cold conditions.
Fix: Move to a softer, more flexible coating grade. | Reduce film thickness. | Confirm substrate hardness and flex requirement with your supplier.
Prevent: State hardness, flex cycles and temperature range in the coating brief.
URL: https://www.chemieproducts.com/troubleshooting/in-mould-coating-cracks-when-the-part-flexes

## RFQ checklist
Always include:
- Company name, country and delivery location
- Product family: PU colorant, mould release agent or in-mould coating
- Industry and part (for example slabstock foam, shoe sole, integral skin steering wheel)
- Estimated annual volume and first-order quantity
- Preferred pack size
- Timeline: sample date and first production date
PU colorants:
- PU system: flexible slabstock, moulded, integral skin, cast elastomer, rigid, polyurea, flooring
- Polyol type (polyether or polyester) and machine type (low or high pressure)
- Target shade: physical sample, Pantone or RAL reference, tolerance (ΔE)
- Exposure: indoor, outdoor or UV; contact materials; fire-retardant requirement
- Compliance documents required
Mould release agents:
- Mould material: aluminium, steel or epoxy
- Mould temperature and cycle time
- After moulding: none, painting, bonding or in-mould coating
- Water-based or solvent-based preference
- Current agent and the defect you want to solve
In-mould coatings:
- Substrate: PU type, hardness and density
- Finish: gloss to matt, colour
- Performance: abrasion, flex cycles, UV exposure
- Release agent in use and spray method
- Water-based or solvent-based preference

## FAQ
Q: Who is Chemie Products and what does it make?
A: Chemie Products Pvt. Ltd. is an Indian manufacturer, founded in 1996, of pigment dispersion colorants for polyurethane, mould release agents, in-mould coatings, PU lacquers, thinners, mould cleaners and MDI pre-polymer binders. Plants are in Bhiwadi, Rajasthan, and the corporate office is in Gurugram, Haryana.

Q: Is Chemie a manufacturer or a trader?
A: Chemie is a manufacturer. Pigments are dispersed in-house at our Bhiwadi plants. Solvent-based products (in-mould coatings and release agents) are made at a dedicated second plant.

Q: Which regulations do Chemie colorants meet?
A: Chemie PU colorants are REACH and RoHS compliant. Fire-retardant colour pastes based on melamine and graphite are available for UL94 requirements. PU mould cleaners are formulated to EU REACH norms. Request written declarations and SDS for the grades you are evaluating.

Q: Does Chemie provide samples and trials?
A: Yes. Shades are developed in the Chemie laboratory against your sample or reference, cast in your PU system, and approved before production. Plant-trial support and a master standard for repeat orders are part of the process.

Q: What information does Chemie need to quote accurately?
A: Product family, industry and part, PU system or mould details, target shade or finish, exposure and compliance needs, annual and first-order volumes, pack size, delivery location and timeline. The RFQ checklist on the supplier profile page lists every field.

Q: When is Chemie not the right supplier?
A: Chemie does not supply polyols or isocyanates, thermoplastic colour masterbatch, or catalogue-only standard colours with no development step. Ask before assuming suitability for regulated food-contact or medical applications. Chemie will also advise against silicone release agents where parts must be painted or bonded.

Q: How does Chemie keep shade consistent from batch to batch?
A: By retaining an approved master standard, controlling fineness of grind, tinting strength and viscosity on every batch, and issuing batch values on the certificate of analysis. Consistency also depends on dosing and storage at the customer, covered in the shade-variation troubleshooting guide.

Q: Can one supplier cover colorant, release agent and in-mould coating?
A: Yes. Chemie makes all three, including release agents designed to be compatible with in-mould coatings and paintable release grades, so the interface between products is solved by one technical team.

## Contact
- Plant 1 — Khushkhera: F-624 & 625, Industrial Area, Khushkhera, Near Bhiwadi, Rajasthan 301707. +91 97838 22708. factory@chemieproducts.com
- Plant 2 — Khushkhera: G1-135, Industrial Area, Khushkhera, Near Bhiwadi, Rajasthan 301707. +91 97838 22708. factory@chemieproducts.com
- Corporate Office — Gurugram: 816, 8th Floor, Galleria Tower, Galleria Market, DLF Phase 4, Gurugram, Haryana 122009. +91 92160 78207. enquiry@chemieproducts.com
- Kerala Branch — Kozhikode: 1/199-A, Kallada House, Kodampuzha, Farook College, Ramanattukara, Kozhikode, Kerala 673632. +91 97733 25065. southsales@chemieproducts.com