| 摘要 |
Disclosed is a light-sensitive material and a process for producing negative relief copies utilizing the light-sensitive material. The light-sensitive material comprises, as the light-sensitive compound, a 1,2-quinone diazide and a quarternary phosphonium compound. The light-sensitive material is imagewise exposed and heated. After cooling, the material is subjected again to an overall exposure, and then developed. By means of this light sensitive material and process, it is possible to produce negative copies from a material yielding positive copies when processed in the customary manner. |
