Picture varnish dammar

Feller, R. L. (1966). First description of dammar picture varnish translated. Bull. American Group... 

Lucanus, F. (2002). Translation of first description of dammar picture varnish by F. Lucanus in 1829. In P. M. Whitmore (Ed.), Contributions to conservation science. Carnegie Mellon University. 

The natural resins used for picture varnishes are made up of mixtures of larger molecules, many of which have now been separated and identified. The molecular formula of the major component of dammar, oleanonic acid (Boon and van der Doelen, 1999), is C30H45O3, MW 454. There are many terms that are used for this concept (Table 2.2), but this book will use molecular weight for simplicity. 

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