Hi Gary,

Yes I thought that Naples yellow was some kind of sulphite in the clay,....but yes, I have heard of the Urine soaked clay pigment theory and know that it is indeed true. But hey! whatever makes for great art!!!! Puts a new meaning to the fairly recent Shock Art show in New York where Guiliani wanted to shut down the show because of the vile "Feces art", as well as other works. Who knows,...we could start a business making our own "yellow" clay just by buying a six pack of beer and going into our own backyards!!! lol. Sort of "a la Warhol pee painting scenario"

Yes, water could be considered a filler, but I doubt that art supply comapnies would use it as such. Simply because it would cost more to ship considering the weight, and also, water doesn't neccessarily make the colourant go farther. I could be wrong on that reason though. Low grade fillers such as chalk, unstrained linseed oil, and other stuff are used as fillers simply because they take the place of companies having to add more (read exspensive), colour pigment. So those cheap paints you buy at the art store are mostly filler with just enough colourant to give the right hue. The exspensive paints are filled with more pigment.

Oh well. I'm glad I have my storage of dry stuff, and a good company to get pigments from. I'll keep on storing them the way I have always done.

This is a cool forum isn't it?

Talk to you later,
ciao
Carter
www.TrompeArt.com