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I want to try adding glitter to some paintings of mine, but I'm wondering how I can do it properly with oil paint?
I found that using Galkyd Lite by Gambin produces the least yellow tinted colour shift, and holds the glitter in perfectly so none flakes off. However I don't know if this could later be an issue due to either the alkyd yellowing (will it yellow?), or the fact that a layer of alkyd is sitting on top of a layer of oil paint.
What issues could I face here, and are there any tests I could conduct to see if it will last? I plan to sell the work so I want it to be high quality.
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Every organic coating will yellow to some degree. Some like
most Regalrez yellow so little that it is imperceptible. Others
like most acrylic dispersion mediums yellow minimally so that it is not noticeable
unless the layer is applied quite thickly. Oil mediums tend to yellow more than
this although some of the oil modified alkyds are better in this regard. So
yes, there will be a little yellowing but as the layer is very thin, this may
not be disfiguring.
As to adherence, drying oils are poor adhesives unlike
acrylic and PVA dispersions which are very good adhesives. The alkyd component
in your medium would improve its performance but not to the degree as those
two. Probably, if you find that the glitter is well adhered, it will remain so,
but I cannot say so with authority.
Others may have a more concrete opinion on this.
Thank you Brian.
Yellowing aside, is there anything inherently wrong with having a layer of Alkyd sitting on top of the paint? Can this cause damage later on to the painting in any way? I don't have much knowledge or experience with alkyd resins like Liquin or Galkyd yet, so I want to make sure I'm using it correctly.
Artists' alkyd mediums are usually quite long, meaning that
they contain a good deal of drying oil as well as the modified alkyd resin. The
reason we caution against having them as a surface coating is precisely because
they will yellow to some extent AND they are not irreversible (at least they
could not be reversed in anything that would not harm the original painting).
They probably would not harm the paint beyond this with the
possible exception that they tend to be formulated to dry quite quickly. I can
envision a circumstance where the alkyd is applied too soon after the oil paint
creating the situation where the surface layers dry but those under are still
soft. You could easily avoid this be waiting before applying the alkyd (the appropriate period of time would correlate to the thickness and composition of the lower oil paint layers).
To reiterate, the primary issue here is the potential
yellowing and irreversibility.