| 摘要 |
The photosensitive composition essentially contains an ester or an amide of 1,2-naphthoquinonediazidesulphonic or -carboxylic acid as light-sensitive compound, a phenol resin which is soluble in aqueous alkaline solutions but insoluble in water, as a binder, and in addition a compound which increases the light sensitivity and is of the general formula <IMAGE> wherein X is a single bond, CH2, SO2, S, CO, C(CH3)2, CHCCl3 or <IMAGE>. The compounds described are, for example, 4,4'-biphenyldiol, bis-(4-hydroxyphenyl) ketone, 2,2-bis-(4-hydroxyphenyl)-propane or bis-(4-hydroxyphenyl) sulphone. The mixture is used as a layer in a light-sensitive recording material which is suitable for the production of a printing plate. Higher light sensitivity does not result in any disadvantages in the copying and printing properties. |
