Question asked 2016-12-11 23:05:28 ...
Most recent comment 2016-12-12 03:06:00
Is it safe to overpaint an alkyd/linseed paint with linseed paint? These Gamblin Faste-Matte paints have a calcium carbonate additive to help with adhesion, but I am worried about varying degrees of flexibility between paint layers, especially because I use a lot of linseed Titanium White in the overpainting. If not, is there a white you would recommend for underpainting?
Answers and Comments
EditDeleteModerator AnswerWe will reach out to our industry contact at Gamblin regarding this question. In the meantime it sounds as if your proposed layering system is not going to cause too many issues so long as you follow the fat over lean rule. Linseed oil paints applied over alkyd-modified oil paints should be fine as long as there is sufficient tooth in the underlying layers. If you are worried about adhesion you might try adding a touch of solvent to your alkyd paints used for underpainting, adding less and less solvent (and even no solvent) to subsequent paint layers. Titanium White used in overpainting should be fine if you adhere to these rules. As for whites recommended for underpainting or indeed painting in general we do NOT recommend paints that contain Zinc white as this pigment is now known to create problems down the road. Check your paint tubes for the code PW4 (Zinc White) as often this pigment is mixed in with Titanium White. Lead white is also a fine pigment to use despite its reputation as a deadly pigment, a reputation that tends to get a bit blown out of proportion (see Number 1 on our "Myths, FAQs, and Common Misconceptions" document in the Resources section). As long you practice safe handling procedures and disposal methods (which you should be practicing anyhow) this pigment can be a joy to work with. But again be sure to check for Zinc white additions in any Lead white paint that you consider purchasing.
EditDeleteModerator AnswerGreat to know Scott. This clears up my one misgiving about the use of alkyd artists' colors under traditional oil paints.
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