The Sun and Oil Painting II April 28, 2022 04:39Using light to dry and brighten oil paint
The Sun and Oil Painting April 18, 2022 16:16
Many times I've read that exposing oil paintings to sunlight (in limited amounts) helps to brighten colors as well as helping them dry faster. The windows in my place point east and north, so I don't get a lot of direct sunlight, but it does slant in in the morning. I finished a recently sold painting with sun-thickened poppy oil (<--). Last time I did this, it took more than a week for the thin coating of poppy oil to dry. This time I decided to try using the sun. I exposed the painting to direct sunlight, propping it in an open window during the morning when direct sun shone on it. This has made the poppy oil coating almost dry in only two days. One more day should do it. Pretty cool!
Now that I've tried this, I'm going to use it to encourage faster drying in future paintings. I usually use walnut oil as a medium (if anything), but I would like to use poppy oil and to adopt more poppy-oil based paints, like Blockx. Outside of wishing to have as little yellowing as possible of my paintings, I have spiritual associations with the poppy. Still, even though I made sun-thickened poppy seed oil several years ago, I have not used it as a medium due to fears about its slow drying. In fact, instead I've used a historical lead/manganese drier in the form of siccatif de Courtrai, applying one tiny drop in each blob of paint on my palette. This really helps make the paint dry faster, but since I've been painting on stretched canvas instead of on panels or boards, I'm taking a risk with respect to possible cracking down the road. It would be great if I could get similar results simply from exposing paint to sunlight. Won't work in winter, but it should for the rest of the year. So I'll give it a try and will report back.
I know I haven't been posting much, but I have been hellishly busy with the nft project I created (which will begin to be auctioned this week), with final edits on The Magic of the Sword of Moses, and with the proposal for my third book, which I am presently researching and writing. Yow!
Siccatif de Courtrai May 1, 2021 13:33
I mentioned Siccatif de Courtrai a couple days ago as a 19th-century paint drier containing lead and manganese that I'd bought some time ago and decided to actually try using. I hadn't used it before because I had been spooked by lead and really, I'd found that by using walnut oil and keeping 5 or more paintings in rotation, I always had something dry I could work on and didn't really need it. I had a separate studio then and so I had plenty of room to store paintings drying.
But now I don't have a separate studio and have way less room for drying paintings, though I am utilizing the space above my T5 plant lights, which get warm but not hot. Still, I felt like it was a good time to check out the various driers I have. I decided to try Siccatif de Courtrai first, not least of all because only one drop was necessary per paint glob. I thought I could deal with that much lead and manganese.
This stuff is supposed to be problematic on linseed oil, causing it to wrinkle, but it is said to work well on paint using walnut or poppyseed oil. Although I had plenty of paints made with linseed oil, I typically have used walnut oil in a solvent-free painting method. I've used poppyseed oil mostly as a finish and a sun-dried version at that.
But the first painting I tried the siccative with, I decided to try painting with regular, NOT sun-dried poppyseed oil, since I have a bunch from a while ago. Although the siccative is supposed to render a relatively thin layer of paint dry in 8-12 hours, that was not the case with the paints to which I added poppyseed oil. In fact, the paint was still wet two days later. Disappointing. I should say I did NOT put a layer of poppyseed oil with siccative to start the painting. I think this might have made a difference.
Yesterday morning, I decided to try it with a painting where I used walnut oil as the medium. This is not any special walnut oil, not heat-treated or sun-thickened but just out of the bottle from Spectrum (although I also have a gallon jug from Jedwards, although you can get a sun-thickened walnut oil from Kremer). I started with a layer of oil+siccative that I applied and wiped off and then painted into, then added one drop of siccative to each paint glob on the palette plus the walnut oil, maybe five drops, which is about as much oil as I usually use.
Amazingly, by the end of the day, the thin parts of the painting were actually dry, and this morning, the whole painting is entirely dry. This is faster than the walnut alkyd I was using, which gives me a headache. This stuff doesn't give me a headache, although it has something of a smell. I'm thinking it has turpentine in it.
The Siccatif de Courtrai I'm using is by James Groves and contains lead and manganese. He makes all sorts of other interesting stuff, some of which I have, like Gentileschi amber medium and the drying walnut heat-bodied oil (which he no longer makes). I will no doubt end up trying these and other of his products, since this siccative has been so successful.
Other companies also make this siccative, but they mostly seem not to include lead or manganese. For instance, I noticed that the version by LeFranc & Bourgeois comes up first in search results, but their "white siccatif de courtrai" doesn't contain manganese, from what I can see, and their newer version of it doesn't contain lead either but instead uses zirconium and calcium. Their brown siccatif de courtrai is/was supposed to contain lead and manganese, but I have not seen it for sale. Sennelier also makes a version, but likewise without either lead nor manganese. In fact, from what I can see, a number of companies make a version of siccatif de courtrai that contains zirconium and calcium instead of lead and manganese. So, not at all the same thing as what I am using, despite the name.
I saw one remark out there that said that this size bottle of siccative would be used up in one underpainting, but all I can say is that the canvas in such a case would be the size of a barn. This is for using at one drop per nut of paint. I think it's going to last me a while, and when I use it up, I should be able to get another bottle for twenty bucks, which is reasonable, IMO.
I'm going to slowly push the envelope with this siccative in terms of paint thickness, since I do like to have a certain blobby quality in some paintings. It would be great if this stuff shortened the drying time for that.
Back to oil painting April 28, 2021 17:00
I've been thinking about doing oil painting again. I've missed it, especially the ability to blend and to glaze easily. I love working with watercolor on the watercolor ground, but it limits what I can do because it lifts so easily.
OTOH, oil paints take a while to dry. I used to deal with that problem when I had a separate studio by having several paintings going at once, like five. There would always be something ready to work on each day, and it helped me learn how to paint faster.
So this morning, I pulled out my oil painting carts and cleaned off all the tubes, which had gotten quite dusty, and the brushes, which were thick with cat hair (miss you, Blackie!) and dust. I used packing tape to easily clean the brushes and sorted through which ones seemed redeemable and which weren't. I also got rid of some that I knew I would not ever use, like the fan brushes and some grainers. I chose the cleanest ones to work with and put the brushes that had gotten stiff from old oil to soak in some citrus solvent. This is the only time I ever use solvent.
Since I'd forgotten a lot of what I knew when I last used my oils, I decided to use the walnut alkyd. This does speed up drying, and I remembered using it a lot in the past. But I forgot that it gave me a headache. I still have that headache 6 hours after finishing painting. So lesson remembered, and I will throw that stuff out.
I do usually paint oil only, no solvent, and typically have used walnut oil, although I've finished some paintings with a layer of sun-thickened poppy oil instead of varnish. It looks nice, doesn't yellow, is easy, and has no solvents. I've always wanted to try making my own paints with poppyseed oil. Nostalgia for a world I never knew, I guess. But I do own a few tubes of Blockx oil paint, which is made with poppyseed oil instead of linseed oil or walnut oil.
At any rate, I began working on a painting and quickly got frustrated, mainly because I forgot to oil in before starting to paint. Oh well. Another wonderful thing about oil paint is how easy it is to wipe off. I did that three times before I got anything that I thought was worth working further on. It's pretty terrible, but it's a start.
My apartment is a loft, so there isn't a lot of room to store wet oil paintings, but I thought to put them on top of the light fixtures I use for my mandrakes with a little fan blowing on them. The fixtures get warm but not hot, and this is out of the way. I can definitely put four paintings on the fixtures if I want to keep a good rotation of dried paintings going. Just not sure if I will enjoy the smell of the drying oil. It's not toxic or anything. I just don't like the scent. But at least now I not only can have all the windows open but I also bought an air purifier for a different reason, and that should help too.
After I got done, I broke out another canvas and started looking around in my cart to see what I had stored in there, and I came across mediums I'd bought in the past and not used. One of them is Siccatif de Courtrai. This is an 19th-century medium that contains lead and manganese as paint driers. I got spooked by lead in the past, in particular because in the past I often resorted to using my fingertips to blend edges of paint, and I know lead can be absorbed through the skin. So I never used the stuff.
But now I thought it would really help me to give it a try, since it is alleged to dry walnut or poppy-based paint in 8-12 hours without the wrinkling it might cause in the presence of linseed oil. If I could get a painting to dry overnight, that would be great.
I have a ton of walnut oil on hand--I bought a gallon a while ago--but I also have some poppyseed oil. So I'm going to try oiling out with that plus one drop of the siccatif. It's also recommended that one drop be added to each glob of paint the size of a quarter.
AND I ordered some gel finger cots, which I can use instead of my bare fingertips if I can't resist doing that.
I also see Tad Spurgeon has a new edition of his vastly wonderful book on oil painting, and that's on my list now too. I've got an older edition but would enjoy seeing what he's come up with since then. Looking forward to making stuff.