FOR LARGE SURFACES on which color is to be slip-painted, the surface on which the color is to go should be roughened, so that the color will become anchored.
THREE DEGREES OF SURFACE can be secured by different treatment. These finishes are, first, Dull Surface; second, Mat Surface; third, Glazed Surface.
DULL FINISH is secured by putting the color into the mold. The mold absorbing the water from the surface causes it to dry dull.
MAT FINISH is secured by placing the color onto the tile or vase surface after the surface has come out of the mold and moistened in water for a few minutes.
GLAZED SURFACE is secured by letting the tile or other object harden in water for several days and then draining off the surplus water, after which the color is slip-painted onto the desired surfaces.
TILE SHOULD NOT BE PERMITTED TO DRY at any time before color is added, as the color will not become attached to the surface.
DO NOT FORGET to roughen the surfaces of the spaces and to add neat cement also before dripping the color onto either the mat finish or glaze finish tiles as described in chapter five in the paragraph on The Glazed Color Finish.
