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The word resin when used in its most specific sense is a hydrocarbon secretion of many plants, particularly coniferous trees. The resin produced by these plants is a viscous liquid, composed mainly of volatile terpenes. Oleoresins are naturally occurring mixtures of oil and resin. Other resinous products in their natural condition are a mixture of gum or mucilaginous substances and are known as "gum resins." Mastic gum is a good example of a gum resin.
Balsam is a term used
The British Library has renovated the search functions for their Online Catalogue of Illuminated Manuscripts. It is worthwhile investigating this vast collection of manuscripts. You can visit the Catalogue.
The Online Catalogue of Illuminated Manuscripts is a searchable database of some of the western illuminated manuscripts in the British Library. The Library holds one of the richest collections of medieval and renaissance manuscripts in the world, and aims to provide access to images