Others, like Alizarin Crimson by Grumbacher don't come off well at all. If you like to be able to lift out whites or lighten areas after the paint is dry, you need to use paints that don't stain heavily. Sedimentary Quality Finally, there is another paint quality you need to know about. Depending on what material is used for the colorant, these particles can be heavy or light. You can even see this happening right in your palette.
Manganese blue is a very good example of a pigment that is very sedimentary.
To test for sediment, you need to make a half inch patch of a color on your test paper, then fill your brush with water and quickly extend the patch to about an inch or more. Then tip the paper back and forth so that the particles will run from the more saturated part of the patch into the more watered down part. You can tip the paper back and forth a couple of times. Let your sample dry, and repeat for each color you want to test. The ones with the most mottled, grainy look are the ones with sediment or heavy pigment particles.