| 摘要 |
<p>PURPOSE:To obtain monoazo lake pigment having a shortened flushing time, slight coloration of waste water, showing excellent dispersibility, clarity and fluidity even in dried and ground pigment because of improvement in wetting to a vehicle even by treatment with a small amount of rosin. CONSTITUTION:This azo lake pigment comprises azo lake pigment which is obtained by making azo dye prepared by coupling a diazonium salt of a soluble group-containing aromatic amine with a coupler component into a lake with a metal salt for lake in the presence of a rosin-modified phenol resin and a dispersant of rosin. Offset ink is composed of the pigment and a vehicle for offset ink.</p> |
