Hydroxamic acid 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.
羟
肟酸化合物在与(i)阻碍
酚显影剂和(ii)三苯甲基
肼和/或甲酰苯
肼共显影剂结合使用时,可用作对比增强剂,以产生超高对比度的黑白光热和热敏成像元件。这些光热和热敏成像元件可用作光掩模,在随后的紫外或短波长可见辐射敏感的可成像介质曝光过程中使用。