The Society of Architectural Historians
The Society of Architectural Historians (SAH) and its members invite the support and active participation of all who share an interest in architecture, past, present, and future. Founded in 1940, the Society encourages scholarly research in the field and promotes the preservation of significant architectural monuments that are an integral part of our worldwide historical and cultural heritage. The Society's 3,500 members include architectural historians, architects, preservationists, students, professionals in allied fields and the interested public. SAH provides an international forum for those who care about architecture and its related arts.
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.