| 摘要 |
PURPOSE:To enhance image density and to solve a problem of development stains by using a specified acrylic resin as a precoat binder in a binary type diazo copying material formed by coating a support with the precoat layer. CONSTITUTION:An intended binary type diazo copying material can be obtained by preparing a copolymer of (meth)acrylate having >2C of the ester part, and acrylonitrile or vinyl acetate, such as butyl acrylate-acrylonitrile copolymer and 2-ethylhexyl acrylate-vinyl acetate copolymer, using this copolymer as the binder of a precoat, forming the precoat layer on a support, and forming a photosensitive layer contg. a diazonium compd., such as p-dimethylaminobenzenediazonium chloride.1/2ZnCl, and a coupler, such as resorcinol on said precoat layer. |
