COLOR SELF-DEVELOPABLE PRESSURE-SENSITIVE RECORDING PAPER

PURPOSE:To reduce developed color staining and to instantaneously obtain high developed color image by using a specific polyvalent metal salt compound as the developer of a recording layer. CONSTITUTION:Paint based on microcapsules containing a color former and paint based on a developer are applied to a support in a laminated form to form a recording layer or both components are uniformly blended to be applied to the support to form a recording layer composed of a coating layer of a single layer form and, as the developer of the recording layer, a polyvalent metal salt compound consisting of salicylic acid, rosin and a polyvalent metal compound is used. The polyvalent metal salt compound is obtained by a method wherein salicylic acid and rosin are dissolved in a solvent such as ether, ketone or acetic ester and the polyvalent metal compound and an inorg. ammonium salt are added thereto and the resulting mixture is heated at 40 - 100 deg.C for 1 - 6 hr and a reaction product is filtered and distilled to remove the unreacted inorg. compound and the solvent.