Imaging processes and elements therefor

Details Imaging processes and elements therefor Imaging processes and elements therefor

1974-04-22

1976-10-05

Smith, Ronald H.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 48R, 96 48HD, 96 87R, 96 90R, 96115R, 20415914, 20415918, 20415921, 427 43, 427 44, G03C 168, G03C 170

Patent

active

039842533

ABSTRACT:
A radiation-sensitive element comprises a support having thereon a composition comprising a depolymerizable polymer, such as a polymer of an aromatic 1,2-dialdehyde, and may also contain a radiation-sensitive substance or combination of substances, binder and/or a color-forming substance or combination of substances.
A negative-working radiation-sensitive process comprises exposing a radiation-sensitive element to radiation, following which the element is heated in order to accelerate the depolymerization reaction. A visible image can be formed during heating by the reaction of the released monomer, such as an aromatic 1,2-dialdehyde, with a color-forming substance included in the element or contained in a separate element, or by heat treatment in the presence of a gaseous color-forming reagent.
A positive-working radiation-sensitive process comprises exposing a radiation-sensitive element to radiation following which the element is heated or contacted with a solvent which removes the exposed areas but permits the unexposed areas to remain as a positive resist.

REFERENCES:
patent: 2892712 (1959-06-01), Plambeck
patent: 3779778 (1973-12-01), Smith et al.
Aso, C. et al., J. of Polymer Science: part A-1, Vol. 7, pp. 497-511, 1969.

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