| 摘要 |
PURPOSE:To obtain a copying material developable at a low temp., having high raw stock preservability and giving a high density image by forming a photosensitive layer contg. a specified diazo compound, a specified coupling component and a specified color developing aid as principal components. CONSTITUTION:A dispersion contg. a diazo compound represented by the formula [where R is 1-5C alkyl, each of R1 and R2 is (substituted) alkyl, oxyalkyl, aralkyl or cycloalkyl, R1 and R2 may bond to each other to form a heterocyclic ring together with N, and X is an anion], a coupling component such as 3-hydroxyphenylurea having <=0.1% solubility in water at <=20 deg.C and about 0.1-10mum grain size, and fatty acid amide represented by formula R2CONH2 (where R2 is 5-24C satd. or unsatd. alkyl) as a color developing aid is applied to a support such as paper or a plastic film and dried to obtain a copying material. An original is superposed on the material and exposed to ultraviolet rays. The materials is then developed at a low temp. such as about 90-130 deg.C to obtain a high density image. |
