SINCE I paint alla prima I usually let my paint dry naturally without any additives. More often I will add walnut oil to slow drying if I need a two day painting session with a large painting. But occasionally I still have need to add dryers when I'm preparing for a show and I need to make a few last-minute adjustments. One such occasion was this week when I needed to adjust some paintings for an upcoming exhibit.
In my second painting I glazed the light parts of the painting using G-gel from Gamblin paints. I added G-gel to my paint as well.
In my third painting I made a putty using walnut alkyd medium made by M. Graham & Company to which I added quite a bit of chalk to thicken it up. In all three cases when I needed white I used a fast drying alkyd titanium white.
The mixture that dried the fastest was the first one, the medium with the cobalt dryer. It dried in one day. This didn't surprise me as cobalt dryer is a powerful additive. Normally I only use it in extreme cases because it is prone to crack and yellow and has toxicity issues. I might use it occasionally to add to a signature or last-minute preparation for a show. The other two mixtures dried in two days.
So while I try not to make using dryers a habit I do use them in the preparation of some of my putties, especially my mixture of Gamblin G-gel and chalk which I think is a perfectly acceptable, archival addition to my painting methods.
Brad Teare © 2009