Collagen for industrial purposes; collagen gel for use in foodstuffs; non-nutritive mixture of protein in the nature of collagen and water in a dry casing for use as an ingredient in the manufacture of food, namely, for forming an edible, external layer encasing food products during the processing of foodstuffs; collagen used as a raw ingredient in the manufacture of food for human consumption and for animal food products; collagen film for use in the manufacture of food for human consumptio...