α-type copper phthalocyanine pigment containing some substituted copper phthalocyanine was synthesized. Its crystalline phase stability was studied using IR spectra
XRD and ESM. Its tinctorial power
specific surface and anti-flocculation were measured. The results show that α-type copper phthalocya-nine pigment containing some RRNO2S-and Br-substituted and some polymerized copper phthalocyanine in aromatic hydrocarbons can inhibit the change in crystalline phase and is resistant to floeculation.