COLOR-DEVELOPING SHEET FOR USE IN NO-CARBON RECORDING SYSTEM

摘要

A color-developing sheet for use in a no-carbon pressure-sensitive recording system, which has a color-developer layer containing synthetic activated clay and an alkyl, aryl or aralkyl ester of p-hydroxybenzoic acid, said synthetic activated clay being produced by acid-treating a clay mineral having a laminar structure comprising regular tetrahedron of silica to such a degree that the content of SiO2 becomes 82 to 96.5 wt % based on dry weight (measured after drying at 105C for 3 hours), bringing the resulting clay mineral into contact in an aqueous medium with a magnesium and/or aluminum compound at least partly soluble in the medium and, when this soluble compound is other than a hydroxide, neutralizing it with an alkali or an acid to form a hydroxide, to thereby introduce a magnesium and/or aluminum component into the acid-treated clay mineral and, if desired, drying the clay mineral.