Oil paintings when kept in the dark tend to darken in colour. Its not the pigments, its the oil. Even the bleached Linseed oil will darken a little. So when the sun shines I take the paintings out of their dark storage and give them an hour to soak up the rays. What a noticeable difference it makes. I think it also helps a bit with the drying process, which apparently, can take years.
This batch of paintings, some of them 2 years old, when exposed to the light reeked of fresh Linseed Oil. A sure sign that there is still some un-oxidised oil present and a reminder of the advice of allowing a year to elapse before final or permanent varnish.
I wonder does anyone take this advice seriously. I agree this is the correct procedure for the hard final picture varnish. I prefer to apply a temporary varnish at 6 months and frame under glass. The option is there to apply a final varnish at some point in the future when the painting is a few years old.
This long drying time really necessitates using some form of accelerated drying agent in the painting. I have switched to using Alkyd paints and sometimes the painting is almost touch dry after a few hours. This paint is based on a resin similar to Liquin, a medium for standard oil paints. Just remember not to apply this as a varnish or for ‘oiling out’ as it seals and retards the drying of all that lies below it.
Here is the video of the above painting process. See you soon.