WATER-COLORS

pigments are transferred from the cakes in they are prepared to the paper or painting-surface by being suspended water. The various colors are times supplied in hard cakes, in case they have to be ground by on a palette and mixed with water the desired consistency. Another venient form is that of fairly soft prepared by mixing the color with a slowly drying gum. A still dier form is prepared by adding a quantity of glycerine, which results a moist color suitable for storage collapsible tubes; it is to be remarked, however, that unle the color is in great quantity, many tubes are to be wasted by the drying of The painting-surface is usually paper, fairly rough surface being preferable; care should be taken that the right z.e. that on which the maker’s mark can be read, is used.