| abstract |
1508802 Photographic materials formed by extrusion AGFA GEVAERT 7 May 1975 [22 May 1974] 22902/74 Heading G2C [Also in Division B2] In Examples: (1) a support is coated with a photo-sensitive composition containing cellulose sulphate, polystyrene, sulphonic acid as viscoelasticity enhancer, and coarse-grained silver halide simultaneously with an anti-stress topcoat containing gelatine; (2) an aqueous composition containing polystyrene sodium sulphonate and chrome alum as visco-elasticity enhancers, silver halide, gelatine, saponin and polyethyl acrylate was coextruded with an anti-stress composition containing gelatine, saponin and polystyrene sodium sulphonate to form two layers on a support; (3) a subbed cellulose triacetate support was coated with an antihalation layer containing MnO 2 , gelatine, polyethylacrylate, SiO 2 and polystyrene sodium sulphonate, and (4) a subbed cellulose triacetate support was coated with a composition containing polyethylacrylate, silver halide and cellulose sulphate. |