Oleogel As A Glazing Medium

Using Oleogel as a Glazing Medium

Oleogel is a firm thixotropic (define thixotropic: The property exhibited by certain gels of becoming fluid when stirred or shaken and returning to the semisolid state upon standing.) gel made with linseed oil and fumed silica (produced in a flame) .

I made two identical sample swatches of the mixtures below painted across a canvas board pre-primed with white gesso.

Sample one: Oleogel with titanium white (no zinc) in five mixtures.
Titanium white 100%
Titanium white 60% Oleogel 40%
Titanium white 40% Oleogel 60%
Titanium white 20% Oleogel 80%
Oleogel 100%

After laying down these mixtures on two separate canvas board swatches I allowed the first of the swatches to dry in complete dark space with approximately 60% humidity; the second canvas board I allowed placed to dry in indirect sunlight approximately 15 hours of the day in approximately 60% humidity. No yellowing is seen on the canvas boards.

The results are the following:

1. The canvas board that was placed in total darkness - all mixtures were still wet to the touch at 30 days, they dried to touch after 60 days and turned a golden yellow like you would almost see in a glass of lemonade.

2. The canvas board that was placed in indirect sunlight - all mixtures were dry to the touch after 20 days and turned pale yellow, not as severe though as the sample placed in darkness.

I believe more experiments are necessary.