Light-sensitive materials

Claim 2

A water-proof, abrasion-proof, weather-proof and chemically-resistant light-sensitive material having excellent resolving power consisting essentially of a support having coated thereon a fine porous plastic layer consisting essentially of a light-sensitive substance and a binder therefor distributed throughout the fine pores of a plastic material selected from the group consisting of triacetyl cellulose/diacetyl/cellulose mixtures, triacetyl cellulose/nitrocellulose mixtures, nitrocellulose/diacetyl cellulose mixtures, polyvinyl chloride/vinyl acetate copolymer mixtures, triacetyl cellulose/cellulose propionate mixtures and triacetyl cellulose/cellulose acetate butyrate mixtures, the pores of said plastic layer having a diameter of from 0.3 to 1.8 microns, said porous plastic layer being formed by a process which consists essentially of: dissolving said plastic material in a solvent therefor to form a solution, the components of the first three of the recited mixtures being present in weight ratios of from 95/5 to 5/95, the components of the last three mixtures being present in weight ratios of from 90/10 to 10/90, adding water to said solution to form a mixture, immediately before phase separation of the mixture, coating said mixture onto said support, drying the coated mixture to form said layer having said fine pores, distributing said light-sensitive substance and said binder in the pores of said pore-containing layer, and drying to form said light-sensitive material.

Claim 3

The light-sensitive material as claimed in claim 1, wherein the light-sensitive substance is selected from the group consisting of a light-sensitive silver halide, a diazo light-sensitive substance, a light-sensitive substance comprising an organic halide and diphenyl amine or its derivative, a quinone diazide derivative, a leuco compound organic halogen generating light-sensitive substance, a photochromic dye and a compound changing color with a pH change and capable of being transformed into an acid or base on radiation of light.

Claim 4

The light-sensitive material as claimed in claim 4, wherein the light-sensitive substance is selected from the group consisting of silver chloride, silver bromide, silver iodobromide and a mixture of carbon tetrabromide and a 3-benzylamino-7-Diethylaminofluoran compound.

Claim 5

The light-sensitive material as claimed in claim 2, wherein the non-silver salt light-sensitive substance is a ferrous ammonium citrate-red prussiate compound.

Claim 6

The light-sensitive material as claimed in claim 1 wherein said fine pores have a diameter of 0.3 to 1.8 microns.

Claim 7

The light-sensitive material as claimed in claim 2 wherein said fine pores have a diameter of from 0.3 to 1.8 microns.

Claim 8

The light-sensitive material as claimed in claim 1, wherein the binder is an organic hydrocolloid.