| 摘要 |
PURPOSE:To obtain a heat development type diazo copying material developable at low temp. and giving a copy with hardly discoloring and fading properties by using a specified diazo compound and a coupling component encapsulated with a specified substance. CONSTITUTION:A support is coated with an aqueous soln. or an aqueous dispersion prepared by dissolving or dispersing a diazo compound represented by formulaIor II (where each of R<1> and R<2> is 1-5C alkyl, Y is 1-5C alkyl, alkoxy or halogen, Z is O or S, and X is an anion), a coupling component encapsulated with a hydrophobic high molecular substance with 50-150 deg.C heat softening temp. formed by polymerizing a vinyl monomer or with a nonpolar waxy substance, a heat fusible auxiliary coupler and other additives. The coated support is dried to form a photosensitive layer. |
