. . "Suitable pattering agents include such inorganic pigments as calcium carbonate, barium sulfate, titanium dioxide, carbon black, yellow lead, bismuth oxychloride, chromium vermilion, cadmium red, navy blue, ultramarine or iron oxide or such organic dyes or pigments, as dyes or pigments of the azo class, vat series dyes or pigments, phthalocyanine, triphenylmethane series dyes, quinacrydone series p" . . . . .