Dear Mitra Conservators,
i heard recently George O’Hanlon warns people that linseed stand oil due to its heating will turns out to be a very brittle film when aged. but i was educated stand oil forms more durable film than regular linseed. so does this some new findings that we need to worry about using stand oil?
also i heard people saying stand oil only initially seems yellow less, but since it dries slower, it does end up yellow as same as regular linseed oil, catch up later, does this also true?
if both is true, then there is very diappointed as linseed stand oil offers no benefit but problems, i got scared.
then if we desire a yellow less but still durable film, should we opt for mixture of linseed and walnut oil, linseed provide film strength and walnut help resist yellowing, actually?
Citation for this please. Can you place online the statement?
First I’ve heard of it. There are many heated oils that do supposedly embrittle more than standard linseed oils, but these have always been those produced in contact with oxygen. Of which stand oil is not.
I’ve found stand oil does yellow more with time, but still less than refined or cold pressed linseed. The less you need to use, the less the risk of observant yellowing.
A mixture of linseed and walnut might have less yellowing than straight linseed, but I doubt the difference will be much better than stand oil.
Fellow artist, Marc.
Hi Marc,
thanks for your comments, plz see below link: https://paintingbestpractices.com/understanding-linseed-oil-best-practices-for-artists/
plz see if you have more comments?
Excellent.
Okay, George O’Hanlon refers here to a study by Ilaria Bonaduce et al. ‘New insights into the aging of linseed oil paint binder.’
The study does NOT include the examination of modern stand oils, but instead the different treatments used in the 19th century on linseed seed oils. In the study they started with the same batch of raw pressed oil and then processed many of them differently. Many of these processes involved heating, but nowhere does it refer to vacuum vessels used to produce stand oil.
Stand oil has been long known in the industry to be more durable than all other heated/thickened oil types and is usually recommended by paint manufactrers as being stronger and more fexible than standard binding oil. It hasn’t been generally used as a binder because it has very poor wetting abilities for pigments, dries slowly and flows out to a flat enamel surface blurring out fine detail. As a medium mixed with pre-made oil paint it avoids the first problem and in moderation the other two are reduced in effect. Personally I doubt we have much to worry about with stand oil.
Marc.
