Fine 30 grit marble sand, bought from ATKO in Tucson. Nordmark says to use washed, angular sand. I think this commercial product complies:
We are using Hardibacker 1/4th inch cement board, which I bought at Lowes. I scored the board with a knife, and then broke it off, to make small tiles:
It might be easier to cut the cement board with a circular saw, to get cleaner edges. Wet the board first:
Fresco just requires pigments ground in water. There is no "glue" or "binder" in the color, unlike with the other mediums. When the lime plaster dries, it locks the color into the surface. In this case, the support is the binder.
We ground Mayan Blue with a glass muller, on a glass surface, with distilled water. The object is to surround each pigment particle with water. I read that the more grinding, the better, but I ground these colors quickly, until they were very soupy:
Grinding caput mortuum from Sinopia:
Grinding Mayacrom yellow:
Grinding Mayacrom violet:
A variety of ground Mayacrom colors in watertight jars. I put a little extra distilled water on the top, to keep them from drying out. The white is just fresco lime from Sinopia:
Pigments fit in a plastic box I later take them out with an eyedropper:
Custom made muller from glass blower that fits in case, commissioned at Fathead, on Fourth Avenue in Tucson:
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