White Masterbatches

It depends on wall thickness, the opacity you are targeting and your polymer. Thin film has no thickness to hide with, so opacity has to come from a high-loaded grade — this is where 70–80 wt% batches earn their price. Thick-wall mouldings often need considerably less, and over-specifying there is pure cost.

Send us the film gauge or a sample part along with your opacity target and we will recommend a loading and a dosage. Request a sample.

They are two crystal forms of TiO₂ and they are not interchangeable. Rutile is denser, more refractive and far more photostable. Anatase is softer, slightly bluer in tone and cheaper, but it is photocatalytically active — under sunlight it attacks the polymer around it, causing chalking and embrittlement at the surface.

For outdoor and long-life parts we supply coated rutile grades. If a white masterbatch quote looks unusually cheap, ask which grade it uses and whether it is surface-coated — our guide on how to write a masterbatch specification covers what to put in writing.

We match the carrier resin to your polymer so the masterbatch blends into the same phase as your resin rather than sitting in it. Standard carriers cover PE, PP, PET, and the engineering grades — PBT, PA6/66, ABS, SAN, PC and PS.

Tell us the exact grade you run, including whether you are using regrind, and we will match the carrier and the processing window to it. Melt flow index is usually the first number we ask for.

There are four common causes and only one of them is the pigment: anatase TiO₂ degrading under UV; phenolic antioxidant gas fading; overheating or excessive residence time during processing; or an optical brightener dosed past its peak, where more brightener makes the part yellower rather than whiter.

Three of the four are process problems, which is why changing supplier often does not fix it. Send us your processing conditions and we will work through it.

Yes. Titanium dioxide on its own is not a UV stabiliser system — it scatters light but does not arrest the radical chain reaction that degrades the polymer. A combined white plus UV additive package avoids running a second additive stream at the machine and removes one dosing error.

Tell us the exposure the part will see and the service life you need. For outdoor film and agricultural applications, our note on how much UV protection outdoor plastics actually need is a good starting point.

Yes. Whiteness is measured on the CIE whiteness index, and different TiO₂ grades and brightener levels shift the tone blue or yellow even at the same opacity.

Send a physical reference — a part, chip or film sample rather than a colour code — and our laboratory will match against it and confirm with you before first production. You can also start from our shade card, or read why colour drifts between batches.

Life Color Pigments & Masterbatches is a white masterbatch manufacturer in India, producing at our plant in Vasai East, Palghar, Maharashtra, on single-screw and twin-screw extrusion lines with a capacity of approximately 10,000 MTPA.

Twin-screw compounding is what makes high TiO₂ loadings possible. The distributive and dispersive mixing breaks down pigment agglomerates that would otherwise show as specks in film or cost you opacity at the same loading. Our laboratory carries out custom colour matching, so whiteness is agreed against your own physical reference before first production. See more about the company and our certifications.

We have supplied the Indian plastics industry since 2008 and export to more than 15 countries. Alongside white we manufacture black masterbatch, colour masterbatch and additive masterbatch.

The grade follows the process, because dispersion behaviour and the opacity you can reach at a given thickness change completely between them.

• Cast & BOPP film — high loadings deliver opacity at low gauge, common in packaging
• Blown film, mono & multi-layer — carrier matched to LDPE, LLDPE or HDPE
• Extrusion coating films — clean dispersion at high line speed
• Sheet extrusion — consistent whiteness across the full web
• Injection moulding, thick and thin wall — loading sized to wall thickness
• Blow moulding — opacity for light-sensitive contents
• Roto-moulding — formulated to disperse under zero shear, as used in water tanks and water management

Tell us the process and the polymer and we will point you at the right loading.