I want to do some impasto painting with 3rd graders. I've read a few
recipes for thickening tempera and I am skeptical.
The one I tried so far was adding laundry detergent powder to liquid
tempera. I got thick paint, but the strong smell bothered me. I
suppose I could go looking for an unscented or less scented powder,
but it seemed to take a lot of powder to get the paint thick, so maybe
there are better options??
I just read about wall paper paste and liquid starch added to powdered
tempera-- only I don't have powder, my tempera is liquid. Would it
work to thicken liquid tempera? I suspect liquid starch is runnier
than the tempera so it would thin it.
Recipes that call for flour or corn starch sound like they would mold
before the paintings could dry.
So, anyway, is impasto possible with tempera? What would keep it
from just cracking as it dried if it was applied thick?