Patent ID: 6040356
Filing Date: 2000-03-21
Classification: B44C,C09D

Abstract:
A durable gravure ink comprising:(A) a high weather resistant pigment selected from the group consisting of quinacridone, perylene and anthracene series red pigments, isoindolinone series yellow pigments, Prussian blue, fast sky blue, and a black pigment comprising a mixture of said red, yellow and blue pigments;(B) a high alkali resistant pigment selected from the group consisting of polyazo red pigments, polyazo yellow pigments, indanthrene blue, and aniline black; and(C) a high weather and high alkali resistant binder selected from the group consisting of a vinyl chloride-vinyl acetate copolymer, a cyclized rubber, a polyurethane comprising an acrylic polyol or polyether polyol and a polyisocyanate, nitrocellulose, an epoxy resin, polyvinyl fluoride, polyvinylidene fluoride, and mixtures thereof,wherein, (1) if said ink is red, said pigments comprise a mixture of at least one red pigment of (A) and at least one red pigment of (B), (2) if said ink is yellow, said pigments comprise a mixture of at least one yellow pigment of (A) and at least one yellow pigment of (B), (3) if said ink is blue, said pigments comprise a mixture of at least one blue pigment of (A) and at least one blue pigment of (B), and (4) if said ink is black, said pigment comprises a mixture of at least one black pigment of (A) and at least one black pigment of (B).