Regalrez 1094 varnsihesApproveRejectUn-ApproveSubscribeUn-Unsubscribe
Question asked 2019-01-09 11:54:24 ...
Most recent comment 2019-01-09 16:43:11
There seems to be a growing belief among painters and art teachers as to the 'miraculous' qualities of varnsihes based on Regalrez 1094. The most common belief seems to be that the full strength commercial varnsih can be safely applied when a painting is touch dry. Contrary to that, one vendror recommends the fingernail test which, in my testing takes anywhere from 2 to 4 minths to give the green light, depending on the number of layers of paint (overall thickness). Another vendor recommends sticking to the tried and true 6 to 12 months. To complicate this there is also some advice to thin a Regalrez varnsih with a solvent and use it as a retouch varnsih on touch dry paint. Can you comment on this? Is a Regalrez varnsih differnt enough that the rues for varnsihing change? What are the risks of varnsihing too soon with a Regalrez varnsih?
Answers and Comments
I see no reason to believe that Regalrez somehow is exempt
from general recommendations about varnish. It is a low molecular weight
synthetic resin, which means that it should appear more similar to natural
resins as compared to polymers, but that should not exempt it from standard
practice. Having written that, I would like to see someone do a real exhaustive
reproducible, double blind study on the effects of premature varnishing on oil film
strength, solvent sensitivity, etc.
As to using it as a retouch varnish, if you mean that it
could be diluted to a thin consistency so that it can be applied over younger
paint films (finger nail test dry) to give some evenness to the sheen before a
final varnish could be applied at a later date, it should be fine. If you mean
a varnish applied over an incomplete painting to show the true colors AND be
overpainted by additional layers of oil paint, that would be a poor idea.
Either you would have a very solvent sensitive layer between oil layers which
could be undercut during later conservation, or you would pick up the resin with
subsequent oil layers making it, in essence, an oil/synthetic resin paint which
would be more sensitive to solvents in the long run.
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