Associated dye salts and method of forming colored indicia therewith

Abstract

.Iadd.Described herein are methods of printing which comprise applying to an unfired silicate surface characterized by high ionizing power a substantially colorless associated salt of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and an organic sulfinic acid whereby physical contact of the associated compound and the silicate dissociates the compound to the intensely colored cation of the dye and produces color on the silicate surface. .Iaddend. .Iadd.

Having described my invention, I claim: 
     
       1. The method of printing which comprises applying to an unfired silicate surface characterized by high ionizing power a substantially colorless associated salt of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and an organic sulfinic acid whereby physical contact of the associated compound and the silicate dissociates the compound to the intensely colored cation of the dye and produces color on the silicate surface. 
     
     
       2. The method of printing which comprises applying to a surface characterized by high ionizing power a substantially colorless liquid, said liquid comprising a substantially colorless associated salt wherein the anion is an organic sulfinic acid anion and the cation is a colored dye cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7, whereby physical contact of the colorless associated compound and the ionizing surface dissociates the compound to the intensely colored cation of the dye and produces color on the ironizing surface. 
     
     
       3. The method of claim 2 wherein the colored dye cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 is an N,N'-alkylated-4,4'-diaminobenzhydryl cation. 
     
     
       4. The method of claim 2 wherein the colored dye cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 is a triarylmethane dye cation. 
     
     
       5. The method of printing which comprises applying to a surface having thereon a coating comprising an unfired silicate characterized by high ionizing power a substantially colorless liquid which comprises an oil-soluble, water-insoluble salt wherein the anion is an organic sulfinic acid anion and the cation is a colored dye cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7, whereby physical contact of the colorless associated salt and the ionizing silicate dissociates the salt to the colored cation of the dye to provide a colored print. .[.6. A recording fluid comprising a solution in a nonaqueous solvent of an associated arylmethane dye salt wherein the anion is an organic sulfinic acid anion and the cation is the intensely colored cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7..]. .[.7. A recording fluid comprising a solution in a nonaqueous solvent of an associated dye salt wherein the anion is an organic sulfinic acid anion and the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation..]. .[.8. A recording fluid comprising a solution in a nonaqueous solvent of an associated dye salt wherein the anion is an organic sulfinic acid anion and the cation is the intensely colored cation of Dinitro Crystal Violet Base..]. .[.9. A new composition of matter comprising the associated dye salt wherein the anion is an organic sulfinic acid anion and the cation is the intensely colored 
     
     
        cation of Dinitro Crystal Violet Base..]. 10. The method of printing which comprises applying to a surface characterized by high ionizing power a substantially colorless associated salt of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and an organic sulfinic acid whereby physical contact of the associated compound and the ionizing surface dissociates the compound to the intensely colored cation of the dye and produces color on the ionizing surface. .[.11. A recording fluid comprising a solution in a nonaqueous solvent of a substantially colorless associated dye salt wherein the anion is a xylenesulfinic acid anion and the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation..]. .[.12. A recording fluid comprising a solution in a nonaqueous solvent of a substantially colorless associated dye salt wherein the anion is a diethylbenzenesulfinic acid anion and the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation..]. .[.13. A new composition of matter comprising the substantially colorless associated dye salt wherein the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation and the anion is a xylenesulfinic acid anion..]. .[.14. A new composition of matter comprising the substantially colorless associated dye salt wherein the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation and the anion is a diethylbenzenesulfinic acid anion..]. .[.15. A new composition of matter comprising the substantially colorless associated dye salt of xylenesulfinic acid and 4,4'-bis(dimethylamino)benzhydrol..]. .[.16. A new composition of matter comprising the substantially colorless associated dye salt of diethylbenzenesulfinic acid and 4,4'-bis(dimethylamino)benzhydrol..]. .Iadd. 17. The method according to claim 10 wherein the associated salt is Michler's hydrol p-toluenesulfinate.