| 摘要 |
A photoimageable printing assembly comprises: (a) an electroconductive support, and (b) a dual layer photosensitive construction comprising (1) a photoresist lower layer sensitive to radiation in the wavelength range of 250 to 450 nm, the photoresist being soluble or dispersible in an aqueous solvent only, in either the exposed or unexposed areas and (2) a photoconductive upper layer comprising zinc oxide in a water-soluble or water-dispersible binder, the layer being sensitive to radiation above 250 nm, and the layer being dispersible in an aqueous solvent. The assembly can be useful for making printing plates and printed circuits.
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