Organic phosphors and process for production thereof

Claim 1

AN AQUEOUS ORGANIC PHOSPHORESCENT PRINTING INK FOR GIVING A PHOSPHORESCENT PRINT CAPABLE OF EMITTING PHOSPHORESCENCE UPON EXPOSURE TO ULTRA-VOILET RADIATION, COMPRISING AN AQUEOUS SOLUTION OF AT LEAST ONE WATER-SOLUBLE, POLYMER SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF GELATIN, POLYVINYL ALCOHOL, GUM ARABIC, TRAGACANTH GUM, SODIUM ALGINATE, CARBOXYMETHYL CELLULOSE, CARBOXYMETHYL CELLULOSE, AND STARCH AND AT LEAST ONE WATER-SOLUBLE, ORGANIC PHOSPHORESCENT ACTIVATING SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF PARAAMINOBENZOIC ACID, PARA-METHYL-BENZOIC ACID, PARA-METHOXYBENZOIC ACID, PARA-HYDROXY-BENZOIC ACID, PARA-HYDROXYDIPHENYL, SALICYCLIC ACID, 1-NAPHTHOL-4-SULFONIC ACID, 2NAPHTHOL-6-,8 -DISULFONIC ACID, 2-NAPHTHYLAMINE-5-7 -DISULFONIC ACID, 2-NAPHTHYLAMINE-6,8 -DISULFONIC ACID, 1-NAPHTHYLAMINE6-(7)-SULFONIC ACID, 2-NAPHTHOL-1-SULFONIC ACID, 2-NAPHTHOL3,6,8-TRISULFONIC ACID, AND 1-NAPHTHYLAMINE-3,6,8-TRISULFONIC ACID WHEREIN SAID PHOSPHORESCENT ACTIVATING SUBSTANCE IS PRESENT IN AN AMOUNT OF 0.5 TO 5 PERCENT BY WEIGHT OF SAID WATER-SOLUBLE POLYMER SUBSTANCE, SAID WATER-SOLUBLE, ORGANIC PHOSPHORESCENT ACITIVATING SUBSTANCE BEING UNIFORMLY DISTRIBUTED IN AND COMBINED WITH SAID POLYMER IN SAID SOLUTION SO AS TO EMIT INTENSE PHOSPHORESCENCE BY ULTRA-VIOLET RADIATION AFTER PRINTING.