COLOR SCIENCE & MASTERBATCHES
The science of polymer coloration — pigment chemistry, color measurement, masterbatch formulation, let-down ratios, and the Indian masterbatch industry worth ₹12,000+ crore.
“Color matching in plastics relies on optics, dispersion, and exact pigment dispersion chemistry.”
— Color Science & Masterbatches · PolymerHub
8 Lessons
CIELAB Colour Matching, ΔE Tolerancing & Masterbatch Formulation Control
Color science for plastics, CIELAB L*a*b* space, CIE Delta E*ab and Delta E00 tolerance formulas, spectrophotometry, metamerism, and computer color matching (CCM).
Special-Effect Pigments: Metallic, Pearlescent & Interference Systems
Special-effect pigments, metallic aluminum flakes, mica-based pearlescent TiO2 coatings, Fabry-Pérot interference flakes, flake orientation, and weld-line elimination.
Color in Plastics: Pigments vs Dyes, CIE L*a*b* & Masterbatch Technology
Organic vs. inorganic pigments, dyes, why pigments dominate plastics, dispersibility, heat stability, light fastness ratings, and the Indian color concentrate market.
Titanium Dioxide: Rutile vs. Anatase Polymorphs, Dispersion & Photo-Catalysis Physics
Rutile vs. anatase TiO2, scattering efficiency, surface treatment, loading levels (typically 5-20% in white masterbatch), chalking in outdoor applications, and Indian suppliers.
Organic Pigments: Phthalocyanines, Azo, DPP & High-Performance Pigment Selection
Blue/green phthalocyanines, azo yellows/oranges/reds, high-performance pigments (quinacridone, DPP, perylene), heat stability requirements vs. processing temperature, and bleed/migration.
Color Measurement & Matching: Spectrophotometry & CIELAB Delta E Physics
CIE L*a*b* color space, spectrophotometer operation, metamerism, Delta E tolerances for acceptance, standard illuminants, and practical color matching in a plastics factory.
Masterbatch Formulation & Manufacturing: Pigment Wetting, Dispersion & Compounding Mechanics
Carrier resin selection, pigment loading (20-70% in concentrate), dispersion quality (filter pressure value), twin-screw compounding for masterbatch, and let-down ratio calculation for injection moulding and film.
Special Effects: Pearl, Metallic, Fluorescent, and Thermochromic Pigments
Mica-based pearlescent pigments, aluminium flake metallic effects, fluorescent brighteners (OBAs), thermochromic and photochromic pigments, and applications in Indian consumer goods and packaging.
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