| 摘要 |
PURPOSE:To form a picture by means of an exfoliation developing method by a method wherein a heat sensitive layer containing heat sensitive substance generating a decarbonxylation reaction by high heat energy exposure is used as a picture forming layer. CONSTITUTION:A picture forming material is used which consists of a transparent supporting body, substance generating CO2 gas by pyrolysis, a heat sensitive layer formed by a composition containing endothermic substance (for example, carbon black, etc.) having picture forming capacity and a binder, an adhering layer and a cover film, a picture is exposed from the transparent supporting body side, a decarboxylation reaction is generated in the heat sensitive layer, the supporting body and the cover film are exfoliated, and an exposed portion is moved to the cover film side. Nonaromatic carboxylic acid (salt), nonaromatic amino acid, nonaromatic ester, lactone, etc. are used as substance generating the said CO2 gas. EFFECT:Defects (a conserving property and the use of a large quantity of a stabilizer) in the case when using a photolytic compound containing N are eliminated. |
