Mainly composed of metal oxides (eg TiO₂, Fe₂O₃, Cr₂O₃…) Colors are less vibrant but stable and heat-resistant Example: Titanium Dioxide (TiO₂ – white), Iron Oxide (red, yellow, brown) Organic Pigments: Has a complex carbon structure Bright, vibrant colors, lower coverage Example: Phthalocyanine Blue, Diarylide Yellow, Quinacridone Red
Color fastness Resistant to fading when exposed to light, temperature, chemicals Dispersibility Easy to mix in plastic, no agglomeration Covering ability Density and ability to cover the base layer Particle size 0.1 – 5 µm, affects fineness and dispersion Compatibility Depends on the base plastic (PE, PP, PVC, PS…) Temperature tolerance 200–300°C (inorganics are generally more heat resistant than organics) Safety Available in food and medical grade (FDA compliant)
