SCHWARZWEISSE PHOTOTHERMOGRAPHISCHE UND THERMOGRAPHISCHE ELEMENTE, DIE N-ACYL-HYDRAZINVERBINDUNGEN ALS KONTRASTVERSTÄRKER ENTHALTEN

摘要

N-acyl-hydrazine compounds are useful as contrast enhancers when used in combination with (i) hindered phenol developers, and (ii) trityl hydrazide and/or formyl-phenyl hydrazine co-developers, to produce ultra-high contrast black-and-white photothermographic and thermographic elements. The photothermographic and thermographic elements may be used as a photomask in a process where there is a subsequent exposure of an ultraviolet or short wavelength visible radiation-sensitive imageable medium.