i have few questions regards oil ground, hope get advices:
1, how does fat over lean works out on oil ground? as we know, oil ground is not really lean, so when you apply highly diluted first layer, probably be leaner than oil ground, then will that break fat over lean rule, that causing issues?
2, does the oil paint adheres oil ground really good? i read a book saying oil paint may not adheres to oil ground, which i think makes sense especially when the oil ground cures in relative longer time that it forms a film that sealed, so not sure if oil paint layer would adhere there any good? by contrast, traditional gesso or acrylic gesso dries with good porosity and oil can sink into them for good interlocking adhesion.
3, oil ground seperate from size? many people against acrylic gesso is saying oil may seperate from acrylic due to different flexibility, then will the same hold true for oil ground may seperate from acrylic/PVA size?
4, does alkyd ground will also becomes brittle over time?
Fellow Artist not MITRA. What is this oil ground? Is it a particular thing or just oil ground in general?
1, Oil grounds are lean, or should be. They should not dry to a high gloss. You shouldn’t in my opinion have any layer “highly diluted” (if that dilution is merely a large amount volatile thinner) on a oil ground, or part of any layer really. perhaps maybe this might be more forgivable as a first layer on a highly absorbant acrylic gesso. But you must understand high dilution with solvent can risk breaking down the attachment with the oil medium.
2, yes should be if the ground is well made. However extreme deformation of the surface with aged paint can cause areas of delamination. There comes a point where something has to give. Acrylic gesso seems to perform well in tests.
3, Acrylic gesso if well made does not have the same problems as layers of oil paint on standard acrylic paint. Personally I like to have a layer, or many, of acrylic gesso between any acrylic size and my oil paint. Others may judge differently.
4, Yes. In my own limited tests it seems to fall between titanium oil grounds and lead white oil grounds. With lead white being the best. Zinc white that is part of any oil ground has tested the worst even if it does contain lead white.
Marc.
Hi Marc,
thanks for your comments, yes oil ground should be lean, but seems we never know how lean it is from then can. Maybe it is best to use for direct painting style? as i think paint out of tube shall be fatter than oil ground.
but for layered painting, i am concerned about if the oil ground is the leanest layer, as the first layer always applied very diluted and suppose to be absorbed oil into the ground. and then the oil from latter layer will sink into this layer to provide enough bonding to it. so debonding will not be an issue in this systemetic way.
so maybe absorbent acrylic gesso is most suitbale for layered painting and non-absorbent or oil ground is best for direct painting?
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