| Abstract: | Summaries. Skin, the raw material of parchment and vellum manufacture, is an organ composed of several tissues the most important of which is connective tissue. This tissue is a complex system of cells and intercellular material which includes fibrous and non-fibrous protein matter. The most important of these proteins present is collagen which is a basic, hydrophilic protein. An explanation will be given of the chemical and physical properties of collagen and the changes which occur during the manufacture and ageing of vellums and parchments. This information will be used to suggest the mode of action of a variety of solvents applied to vellum. |
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