| http://www.w3.org/ns/prov#value | - Specifically, the viscosity adjustment agents, surface tension adjustment agents and the pH adjustment agents may be enumerated by proteins, such as gelatin or casein, natural rubbers, such as gum Arabic, cellulose derivatives, such as methyl cellulose, carboxymethyl cellulose or hydroxymethyl cellulose, natural high polymeric materials, such as lignin sulfonates or shellacs, polyacrylates, styren
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