Abstract
Required quality of the types, methods etc. of the post press of offset printed materials were discussed. The minimum requirement for surface processing materials and problems of actual process as well as characters of different types of based ink were studied. The new trend of the mechanism and material of in-line offset printing and the representative differentiated method were introduced. In addition to surface decoration and surface protection which are the original requirement for post press, the future trend represents by the keyword of its environmental correspondence and differentiation were studied.
