Graphic Artists Guild
The purpose of the Graphic Artists Guild is to promote and protect the social, economic and professional interests of its members. The Guild is committed to improving conditions for all graphic artists (including, but not limited to: animators, cartoonists, designers, illustrators, and digital artists) and raising standards for the entire industry. The Guild embraces graphic artists at all skill levels.
I love these pallets. I have one for my warm yellows, 1 for cool yellows and you can write on the 2 big wells with the colors that are above ;if you use a woodless graphite pencil, it won't rub off easily. This way I know the exact color and color bias for my red, blues, yellows, violets, greens, and oranges. I find I only need one for my white, black/grey tints and earth tone water colors. For stains, I clean off with olive oil then follow with soap and water so oil doesn't get into my watercolor pigments.