PIGMENT BULE 15:4(C.I.NO.;PB15:4,PIGMENT BLUE 15:4) 

C.I.NO.:PB15:4,PIGMENT BLUE 15:4 is a Copper Phthalocyanine Blue pigment designated in the the Colour Index. It is stabilized towards flocculation, and shows largely the same coloristic and fastness properties as C.I.NO.:PB15:3,PIGMENT BLUE 15:3 types, but often exhibits much better rheology. As with stabilized Copper Phthalocyanine Blue types, stabilization through surface treatment has proven to decrease the solvent fastness of Copper Phthalocyanine Blue, sometimes considerably so, making the pigment more sensitive to aromatics, alcohols, ethylene glycol, and ketones. This product is an attractive choice for oven drying paints, and is also recommended for gravure printing inks.