Continuous method of producing phthalocyanine pigment dispersions in organic solvent

The method of converting a phthalocyanine crude wherein at least 80% of the crude particles have a size greater than 1 micrometer to a dispersed form which is useful in inks and coatings, said method comprising

• (A) premixing phthalo crude at about 10 to 50% by weight with from about 5 to 20% by weight of surfactant based on pigment in a binder containing an organic solvent, said premixing being accomplished by agitation to break down loose crude agglomerates and obtain a uniform blend of the crude without appreciably reducing the particle size of the crude, and
• (B) continuously pumping the blend of (A) through at least one but preferably two shot mills containing between 50 and 90% by volume of a grinding media that has a size of from about 0.1 to 2.5 mm. diameter and then grinding at such rate that the particle size has been reduced to pigment particle size.