| 摘要 |
The object of the present invention is to provide a novel and useful thermal developing type diazo copying material wherein an initial image quality and an initial image reliability are maintained, while undesired coloring can be avoided and long-term preservation characteristics can be improved. The present invention comprises a support, a photosensitive layer formed on said support, said photosensitive layer including a diazo compound, and a coupler layer formed on said support, said coupler layer including a coupler component, said coupler layer having a copolymer including a monomer having a carboxylic acid and water-soluble guanidine salt.
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