| http://www.w3.org/ns/prov#value | - As protective colloids for silver halide emulsions, mention may be made of, for example, natural materials such as gelatin, modified gelatin, albumin, agar, gum arabic and alginic acid and water-soluble synthetic resins such as polyvinyl alcohol, polyvinyl pyrrolidone and copolymers of acrylamide, acrylic acid and vinylimidazole.
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