Water base ink compositions for neon boards

摘要

A water base ink composition for writing on neon boards which comprises: (a) water in amounts of not less than 30% by weight; (b) hollow resin particles dispersed in the water, in amounts of 0.5-50% by weight; (c) a resin which is film-forming at room temperatures in amounts of 0.5-30% by weight; and (d) an aqueous emulsion of at least one nonvolatile or only slightly volatile compound which is liquid at room temperatures and is selected from the group consisting of aliphatic carboxylic acid esters, higher hydrocarbons and higher alcohols in dry amounts of 0.5-25% by weight. Writings or marking formed with the ink composition on transparent panels such as of polymethyl methacrylate are intensely and vividly brightened when the side face receives light incident perpendicularly into the panel, as the panels are called "neon boards".