Pressure sensitive recording paper
AssigneeMitsubishi Paper Mills Limited
InventorsShigetoshi Hiraishi, Sadao Morishita, Toshihiko Matsushita
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Abstract
There are disclosed three kinds of pressure sensitive recording papers obtained by combining a colored oil-soluble dye, a microcapsule containing organic liquid and a whitening agent. These pressure sensitive recording papers have advantages that a record image of sufficient color density can be obtained by using said dye in only a small quantity, they are resistant to light, heat, chemicals, etc., they are excellent in conservability, and so on.
Claims7
A pressure sensitive recording paper which either (a) consists of a transfer sheet and an accepting sheet, wherein said transfer sheet has on its back surface a transfer layer consisting mainly of microcapsule containing an organic liquid which is a solvent capable of dissolving a colored oil-soluble dye, said accepting sheet has on its front surface a white-colored accepting layer consisting mainly of a mixture of colored oil-soluble dye and whitening agent, and a dark-colored record image can be obtained by using said transfer sheet and said accepting sheet so that their coated layers confront each other, or (b) consists of a transfer sheet and an accepting sheet, wherein said transfer sheet has on its back surface a white-colored transfer layer consisting mainly of a mixture of colored oil-soluble dye and whitening agent, said accepting sheet has on its front surface an accepting layer consisting mainly of microcapsule containing an organic liquid which is a solvent capable of dissolving a colored oil-soluble dye, and a dark-colored record image can be obtained by using said transfer sheet and said accepting sheet so that their coated layers confront each other or (c) is a pressure sensitive recording paper, wherein its transfer sheet has on its back surface a white-colored transfer layer consisting mainly of a mixture of (1) microcapsule containing an organic liquid which is a solvent capable of dissolving a colored oil-soluble dye, (2) colored oil-soluble dye and (3) whitening agent, and a dark-colored record image can be obtained on a plain paper by using said transfer sheet so that its transfer layer confronts the plain paper.
Dependencies are inferred from the claim text.