Colored crayons for decorating ceramic ware

Claim 1

A LATENT-COLORED CRAYON FOR DECORATING THE CERAMIC SURFACE OF CERAMIC WARE AND BEING ADHERENT IN LAYER FORM TO SAID SURFACE UPON APPLICATION THERETO PRIOR TO THE FIRING OF THE CERAMIC WARE, THE DEFINITIVE COLOR OF SAID LAYER BEING DEVELOPED UPON SUBSEQUENT FIRING OF SAID WARE, SAID CRAYON BEING PREPARED BY HOMOGENOUSLY ADMIXING 73 PARTS BY WEIGHT OF LEAD NITRATE, 33 PARTS BY WEIGHT OF ANTIMONY OXIDE, 12 PARTS BY WEIGHT OF ALUMINUM OXIDE AND 100 PARTS BY WEIGHT OF THE RESULTANT ADMIXTURE PASTE OF 10 PARTS BY WEIGHT OF THE RESULTANT ADMIXTURE AND 3 PARTS BY WEIGHT OF CALCIUM STANNATE WITH 1 PART BY WEIGHT OF 10% DEXTRIN, PRESSING THE RESULTANT PASTE INTO THE FORM OF A CRAYON AND HEATING SAID CRAYON AT A TEMPERATURE BETWEEN 400* AND 1000*C., WHEREBY UPON DIRECTLY APPLYING SAID CRAYON TO SAID CERAMIC SURFACE A LAYER OF PIGMENT-FORMING MATERIAL AND CARRIER IS DEPOSITED ON SAID SURFACE, WHICH LAYER UPON FIRING OF THE CERAMIC WARE DEVELOPS YELLOW COLORED PIGMENT, WHEREBY DECORATION OF THE SURFACE OF CERAMIC WARE MAY BE ACCOMPLISHED BY MARKING WITH SAID CRAYON AND WITHOUT THE NECESSITY OF USING PAINT.