Electrically conductive inks for gravure printing - comprising colloidal dispersion of silver or graphite in dispersing agent contg. dissolved binder

摘要

Gravure printing process uses a gravure ink comprising a colloidal dispersion of an electrically conductive solid material in a dispersing agent contg. a dissolved binder such that the binder content is ca. 10 wt.% w.r.t. total solids. The prods. are useful in the mass prodn. of e.g. question and answer games requiring a pattern of electrically conductive lines to be applied so that e.g. the answer to a question can be indicated by means of an electrical signal. Gravure printing is considerably faster and more economical than prior methods of prodn. of such prods.