An 8-ounce tin of Tragacanth will make two or more gallons of the floating medium for marbleizing paper. There's no hurrying Tragacanth. It will take at least a day for it to absorb all the water and make a gelled slurry. Pour the slurry into a large shallow pan (photographic trays are perfect). Mix oil paints with a bit of turpentine to the consistency of thick cream. Drop a few drops of color into the pan. If the color sinks, it is too thick. Thin with a little more turpentine. If the color spreads, it is too thin, add a little more paint. When the right thickness is achieved, drop large spots of color, one at a time onto the solution. With a spoon or a stick, swirl into patterns (wide tooth combs are excellent for certain effects). Cut a piece of paper slightly smaller than the size of the pan. Holding opposite corners of the paper, lower on to the solution. Lift the paper carefully and place right side up on a stack of newspaper to dry. Marbleizing fabric is done in the same way except the fabric must be thoroughly washed previous to marbleizing and soaked in a mix of 1/4 cup Alum to each quart of water.