| http://www.w3.org/ns/prov#value | - Each photographic construction layer may contain one or more of the following binders: hydrophilic colloids, which include protein such as gelatin, colloidal albumin or casein; cellulose compounds such as carboxymethyl cellulose or hydroxyethyl cellulose; saccharide derivatives such as agar, sodium alginate or starch derivatives; and synthetic hydrophilic colloids, for example, polyvinyl alcohol,
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