Pigment Black 28(Copper Chromite Black) is a bluish black. It has excellent heat resistance, light resistance, acid resistance and alkali resistance in common. As a result of our own advanced manufacturing technique and strict control, which endow it with high tinting strength and good dispersibility.
It can be use for Silicone heat-resistant coatings, color masterbatch, plastic, coil coatings, fluorocarbon coatings, ceramic coatings, glass printingink, automotive tempered glass ink, etc.
Density (g/cm3) | 5.0,5.2 |
PH value | 7.0,7.2 |
Oil Absorption(g/100g) | 11,20 |
105℃Volatile Matter% | ≤0.5 |
Water soluble Matter% | ≤0.5 |
Residue on 45um Mesh% | ≤0.1 |
Heat resistant | 800℃ |
Light Resistant | 8 |
Acid resistant | 5 |
Alkali Resistant | 5 |
Pigment Black 28 (C.I. Pigment Black 28) is a calcined mixed oxide — a copper/chromium spinel produced by high-temperature solid-state reaction of metal oxides. The high-temperature calcination forms a stable crystalline spinel matrix that gives the pigment its thermal and chemical robustness.
Choose PBk28 when you need thermal stability, resistance to chemical attack, or long-term outdoor durability that carbon blacks or organic blacks cannot provide. Typical applications include high-temperature coatings, ceramic and glass printing inks, fluoropolymer coatings, and color masterbatches for engineering plastics.
Use high-shear mixing or bead milling with appropriate dispersants. Start with a wetting step (low-shear pre-dispersion), then apply high-energy milling to reach target particle breakup. Trial small lab batches to optimize mill time, dispersant type and solids level for your binder or polymer system.
Treat Pigment black 28 as an inorganic pigment powder: avoid inhalation of dust, use local exhaust ventilation, and follow the supplier’s SDS for protective equipment and disposal. Note the CAS number and regulatory details on supplier documents when preparing safety and import/export paperwork.
