Common use of Varnish Clause in Contracts

Varnish. Part of the MEMORI project has focused on investigating the effect of organic pollutants (acetic and formic acid) on varnishes. This investigation was performed by the Department of Chemistry and Industrial Chemistry, University of Pisa, and the Thermal Methods and Conservation Science Centre at Birkbeck, University of London. Experiments were based on the following varnishes, dammar, resin mastic, Regalrez 1094, Laropal A81 and dammar with a coating of Regalrez 1094. For all the varnishes studied damage has been observed, from the chemical and physical point of view. Natural resins dammar and mastic showed oxidation under exposure to organic acids (Figure 11).