STUDY OF PIGMENT (COPPER PHTHALOCYANINE B LUE) DISPERSION BY MICRO PORE ANALYSIS TECHNOLOGY

Pigment dispersion is one of the biggest important problems in colorin g industries. Authors applied the micro pore distribution analysis, pr oposed by BARRET(5)), and micro pore volume analysis (de Boer(6)), t-p lot analysis) to the pigment(copper phthalocyanine blue pigment)disper sion. Pigment samples with different particle size, different drying c onditions and different surface character were prepared for the study. Micro pore analysis using N-2 gas adsorption and desorption measureme nt could be good way to estimate the pigment agglomeration structure a nd the dispersibility of each pigment sample. Pigment dispersion and c olor strength reading made by ordinary pigment dispersion technique, s howed good relation with micro pore analysis. Samples having large num ber of micro pores at smaller micro pore size on the distribution curv e showed good dispersibility, and larger micro pore volume directly re lated to the dispersibility of the pigment.