Assertion: collagen's composition | /r/HasProperty | collagen 70.3%
Facets:
Source sentences:
text: A typical collagen sheet is cast from solution to a thickness of about 1.8 to 2 mm and contains the following composition by weight: collagen 70.3%, plasticizer (typically glycerol or glycerine) 16.9%, water 9%, other 3.8%.