Colorless recording paper

Claim 2

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from an organic sulfinic acid and an arylmethane dye base characterized by a logarithmic dissociation constant below 7, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 3

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from an organic sulfinic acid and an N,N'-alkylated-4,4'-diaminobenzhydrol, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 4

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from an organic sulfinic acid and an N,N'-alkylated-4,4'-diaminobenzhydrol, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 5

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from an organic sulfinic acid and an arylmethane dye base characterized by a logarithmic dissociation constant below 7.

Claim 6

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from an organic sulfinic acid and an arylmethane dye base characterized by a logarithmic dissociation constant below 7.

Claim 7

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from an organic sulfinic acid and an N,N'-alkylated-4,4'-diaminobenzhydrol.

Claim 8

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from an organic sulfinic acid and an N,N'-alkylated-4,4'-diaminobenzhydrol.

Claim 9

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from hydrazoic acid and an arymethane dye base characterized by a logarithmic dissociation constant below 7, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 10

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from hydrazoic acid and an arymethane dye base characterized by a logarithmic dissociation constant below 7, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 11

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from hydrazoic acid and an N,N'-alkylated-4,4'-diamino benzhydrol, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 12

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt derived from hydrazoic acid and an N,N'-alkylated-4,4'-diamino benzhydrol, which upon transfer to a suitable receiving sheet is dissociated to the intensely colored ionic form of the dye to furnish a colored print.

Claim 13

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from hydrazoic acid and an arylmethane dye base characterized by a logarithmic dissociation content below 7.

Claim 14

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from hydrazoic acid and an arylmethane dye base characterized by a logarithmic dissociation content below 7.

Claim 15

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from hydrazoic acid and an N,N'-alkylated-4,4'-diaminobenzhydrol.

Claim 16

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt derived from hydrazoic acid and an N,N'-alkylated-4,4'-diaminobenzhydrol.

Claim 17

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt wherein the cation is the intensely colored cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and the anion is chosen from the group consisting of hydrazoic acid anion and organic sulfinic acid anion.

Claim 18

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt wherein the cation is the intensely colored cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and the anion is chosen from the group consisting of hydrazoic acid anion and organic sulfinic acid anion.

Claim 19

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt wherein the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation and the anion is chosen from the group consisting of hydrazoic acid anion and organic sulfinic acid anion.

Claim 20

A transfer sheet having upon its surface a coating containing a substantially colorless dye salt wherein the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation and the anion is chosen from the group consisting of hydrazoic acid anion and organic sulfinic acid anion.

Claim 21

A transfer sheet having upon its surface a coating containing the substantially colorless salt of toluenesulfinic acid and 4,4'-Bis (Dimethylamino) benzhydrol.

Claim 22

A transfer sheet having upon its surface a coating containing the substantially colorless salt of toluenesulfinic acid and 4,4'-Bis (Dimethylamino) benzhydrol.

Claim 23

A transfer sheet having upon its surface a coating containing the substantially colorless salt of xylenesulfinic acid and 4,4'-Bis (Dimethylamino) benzhydrol.

Claim 24

A transfer sheet having upon its surface a coating containing the substantially colorless salt of xylenesulfinic acid and 4,4'-Bis (Dimethylamino) benzhydrol.

Claim 25

A transfer sheet having upon its surface a coating containing the substantially colorless salt of diethylbenzene-sulfinic acid and 4,4'-Bis (Dimethylamino) benzhydrol.

Claim 26

A transfer sheet having upon its surface a coating containing the substantially colorless salt of diethylbenzene-sulfinic acid and 4,4'-Bis (Dimethylamino) benzhydrol.

Claim 27

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt wherein the cation is the intensely colored cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and the anion is an organic sulfinic acid anion.

Claim 28

A manifolding sheet comprising a web having a coating on one side thereof, said coating comprising a solvent and a colorless dye salt wherein the cation is the intensely colored cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and the anion is an organic sulfinic acid anion.

Claim 29

The manifolding sheet of claim 14 wherein the coating comprises a hydrophobic fluid dispersed in the form of discrete droplets in a hydrophilic colloid binder.

Claim 30

The manifolding sheet of claim 14 wherein the coating comprises a hard waxy material and a hydrophobic plasticizing fluid of low ionizing power. .[.17. A recording paper comprising a base web consisting essentially of intermeshed paper fibers, said fibers impregnated with a recording composition containing as a constituent thereof a substantially colorless dye salt wherein the cation is the intensely colored cation of an arylmethane dye base characterized by a logarithmic dissociation constant below 7 and the anion is an organic sulfinic acid anion..]. .[.18. A recording paper comprising a base web consisting essentially of intermeshed paper fibers, said fibers impregnated with a recording composition containing as a constituent thereof a substantially colorless dye salt wherein the cation is an N,N'-alkylated-4,4'-diaminobenzhydryl cation and the anion is an organic sulfinic acid anion..].