A viscous to semisolid suspension of finely divided pigment in a drying oil such as heat-bodied linseed oil. Alkyd, phenol-formaldehyde, or other synthetic resins are frequently used as binder,and cobalt,manganese, and lead soaps are added to catalyze the oxidative drying reaction.
Some types of inks dry by evaporation of a volatile solvent rather than by oxidation and polymerization of a drying oil or resin.Use distribution is: off set 40%, gravure 23%, flexographic 18%, letterpress 9%, screen 4%,other 6%.
