Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Finishing or perfecting composition or product
Patent
1981-03-31
1983-11-22
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Finishing or perfecting composition or product
430302, 430309, G03C 534, G03C 500
Patent
active
044169760
ABSTRACT:
This invention relates to a developer solution for the development of exposed light-sensitive reproduction layers comprising a water-insoluble binder and a water-insoluble diazonium salt polycondensation product. As the essential constituents, this developer solution contains glycol ethers, glycol esters and water, in detail--about 30 to 80% of a compound of the formula ##STR1## wherein n=1 to 4 and m=1 to 5; about 3 to 30% of a compound of the formula ##STR2## wherein R.sup.1 and R.sup.2 are acyl groups containing 1 to 4 carbon atoms, or one of the two groups is a hydrogen atom and R.sup.3 is a hydrogen atom or a methyl group; about 0 to 15% of 1,3-dioxolane-2-one or 4-methyl-1,3-dioxolane-2-one; about 0 to 20% of a polyhydric alcohol; about 0 to 10% of an organic or inorganic salt which is soluble in the solvent mixture; and about 5 to 45% of water.
The invention relates further to a process for the development of negative-working reproduction layers based on (a) water-insoluble diazonium salt polycondensation products and (b) binders which are insoluble in water and in dilute aqueous alkaline solutions. In the process, the exposed reproduction layer is treated with the above-specified developer solution in order to dissolve the unexposed layer areas.
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Bowers Jr. Charles L.
Bryan James E.
Hoechst Aktiengesellschaft
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