Electrographic formation of dye images

Claim 2

The invention of claim 1 wherein (B) and (C) are performed substantially simultaneously by pre-wetting the receiving element with said activating solution and contacting the resultant wetted receiving element with the toner particle image formed in (A).

Claim 3

The invention as described in claim 1 wherein said ethylenically unsaturated polymerizable monomers comprises two to about 19 carbon atoms and a basic nitrogen-containing moiety.

Claim 4

The invention as described in claim 1 wherein said ethylenically unsaturated polymerizable monomer is selected from the group consisting of aminostyrene, vinyl pyridine, vinyl amine, amino-substituted alkyl methacrylates, amino-substituted alkyl acrylates and vinyl imidazole.

Claim 5

The invention of claim 1 wherein a multiple-color image is obtained on said receiving element by successively repeating (A) to (C) to form superimposed, in register, on said receiving element a series of individual dye images, each of said images representing an individual color separation image of an original image.

Claim 6

In a method of liquid developing an electrostatic charge pattern carried on an electrically insulating substrate to obtain a water-soluble dye image corresponding to the charge pattern, the improvement which comprises: A. forming on a hydrophobic surface an image of electrostatically attractable toner particles corresponding to such charge pattern using a liquid developer comprising said toner particles admixed in a liquid carrier vehicle having a dielectric constant less than about 3.0 and a resistivity greater than about 1010 ohm-cm, said toner particles comprising a binder and a colorant consisting essentially of an acidic, water-soluble dye, said binder comprising a hydrophobic copolymer having as a repeating unit thereof a group derived from an ethylenically unsaturated polymerizable monomer comprising two to about 19 carbon atoms and a basic nitrogen-containing moiety; B. contacting said toner particle image carried on said hydrophobic surface with an activating solution comprising an acidic aqueous solution having a pH less than about 6.5 to convert said hydrophobic copolymer contained in said toner particles to the hydrophilic form thereof; and C. contacting said hydrophilic dye-containing particle image carried on said hydrophobic surface with a receiving element comprising a hydrophilic colloid layer containing a mordant for the dye to transfer and mordant said image to the colloid layer of the receiving element.

Claim 7

The invention as described in claim 7 wherein (B) and (C) are performed substantially simultaneously by pre-wetting the receiving element with said activating solution and contacting the resultant wetted receiving element with the toner particle image formed in (A).

Claim 8

The invention as described in claim 7 wherein said ethylenically unsaturated polymerizable monomer is selected from the group consisting of aminostyrene, vinyl pyridine, vinyl amine, amino-substituted alkyl methacrylates, amino-substituted alkyl acrylates and vinyl imidazole.

Claim 9

The invention of claim 7 wherein a multiple-color image is obtained on said receiving element by successively repeating (A) to (C) to form superimposed, in register, on said receiving element a series of individual dye images, each of said images representing an individual color separation image of an original image.

Claim 10

The invention as described in claim 7 wherein said acidic water-soluble dye is selected from the group consisting of 4,4''-bis(1-acrylamino-3,6-disodiumsulfo-8-hydroxynaphthalene-7-azo)-2, 2'',5,5''-tetramethyltriphenylmethane; 4,4''-bis(p-alkoxyphenylazo)-2,2''-disodiumsulfostilbene; 4,4''-(6,8-disodiumsulfo-2-naphthylaminocarbonyl-p-phenylazo)-3,3'' -dimethylurea; 1-(p-sulfophenyl-3-methyl-4-(4,8-disulfonaphthyl-2-azo)-5-pyrazolone trisodium salt; (1-hydroxy-3,6-disodiumsulfo-8-acetylaminonaphthyl-2-azo)-4-(1-hydroxy -3,6,disodiumsulfo-8-aminonaphthyl-2-azo)-2,5-dimethoxy benzene; 1-(p-sulfophenyl-3-phenyl-4-(2,5-dichloro-4-sulfophenyl-1-azo)-5-pyrazolone disodium salt; 1-carboethoxy-3-methyl-6-(4''-chloro-2''-sulfoanilino)-2-oxo-2,3 -dihydrobenzanthrone, sodium salt; 5,5''-ureylenebis(2-(2-amino-6-sulfo-8-hydroxy-1-naphthylazo)benzenesulfonic acid), tetrasodium salt, C.I. 25380; 3,3''-(4,4''-ureylenebis(2-methylphenylazo))bis(1,5-benzenedisulfonic acid), tetrasodium salt, C.I. 29025; 5-(2-anilino-4-(4-(3-carboxy-4-hydroxyphenylazo)-anilino)-s-triazin-2 -ylamino)-4-hydroxy-3-(4-(8-hydroxy-3,6-disulfo-1-naphthylazo)-2-methoxy-3 -methylphenylazo)-2,7-naphthalenedisulfonic acid, pentasodium salt, C. I. 34045; 6,6''-ureylenebis(2-(4-(2,4-dichloro-6-sulfophenylazo)-3-methylphenylazo)-1 -naphthol-3-sulfonic acid); and anhydro-3,6-bis(diethylamino)-9-(2,4-disulfophenyl)-xanthylium hydroxide, sodium salt, C. I. 45100.