is, in many aspects, closely similar to that of its parent collagen. Photographic and pharmaceutical grades of gelatin generally are sourced from cattle bones and pig skin. Gelatin is classified as a hydrogel.

Gelatin is nearly tasteless and odorless with a colorless or slightly yellow appearance. It is transparent and brittle, and it can come as sheets, flakes, or as a powder. Polar solvents like hot water, glycerol, and acetic acid can dissolve gelatin, but it