Abstract
ConclusionsIt seems quite apparent that the use of drying oils in classical varnishes is giving way to the use of oils in similarly functioning coatings or drying oil‐free coatings.The chemistry of drying oils in the varnish‐cooking process is not too clearly established but appears to be one of ester interchange between oil and resin. More research in this area is indicated. However if future research is to be undertaken, it must be justified. In view of the declining varnish market, this is doubtful.Lack of data makes it impossible accurately to correlate oil and resin functionality into a usable mathematical relationship.
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