Abstract
Pigment has been applied as color material for ink jet for 10 years. At first, pigment for ink jet was selected from existing products for another application like offset ink, coatings. After that, pigment for ink jet use was developed to meet quality requirement in this use. In this paper, I explain organic pigment focusing on the difference between dyestuff and pigment, classification of organic pigment. Then, quality requirement to pigment for ink jet use, and action in producing pigment to meet these quality requirements are explained.
