Preparing the water in the marbling tray is a very important step in the marbling art. The water, which is prepared to stop the marbling paint from sinking, must have a standart intensity and consistence. By this way the paints which stand on the surface of the water can hold on to the paper. In traditional marbling, natural goods like gum tragacanth and carrageenan are used for thickening. However, nowadays there are syntetic thickeners at the market. You can have gum tragacanth inverted to liquid thickener. Carrageenan gives good results at marbling works. You can find and buy different kinds of thickeners from Karin Art web site online easily.