Method of making picture tube fluorescent screen

摘要

There are disclosed a composition for making a picture tube fluorescent screen characterized by essentially consisting of a light-sensitive resin at least having recurring units (1) and (2) represented by the formulas: <IMAGE> (1) <IMAGE> (2) wherein R and X- have the same meanings as defined in the specification, and CaS-based phosphor particles which are dispersed in an aqueous medium, and a method of making a picture tube fluorescent screen using the same. According to this invention, it is possible to make a picture tube exhibiting an excellent light emitting efficiency and a contrast by a simple process.