The kinetics of dissolution of varnishes: The influence of vapour pressure on the rate of solvent action

Effective and responsible use of solvents is an important competence of a
conservator/restorer. The goal to selectively remove components such as
varnishes from the surface without affecting underlying paint is a common
challenge in the field of restoration. The complexity of the processes of
solvation and dissolution has given rise to several approaches by various
groups to simplify solvent action and deliver some selection criteria to
the restorer. In general, however, these approaches lack both a qualitative
and quantitative description of the dissolution processes. In the context of
practical conservation needs, knowledge of the rate of solvent action will
decide the ability to control a conservation treatment. Since the kinetics
of solvent action mainly depend on an entropy change in the dissolving
process, a different approach is necessary to satisfy the demands of current
conservation practice.