No-carbon copying paper

There is disclosed no-carbon copying paper composed fundamentally of a color former sheet produced by coating a support with microcapsules containing a colorless electron-donative organic compound as a color former and a color developer sheet produced by coating a support with a coating color containing activated clay as a color developer which adsorbs the aforesaid electron-donative organic compound to develop color. When said coating color is prepared by adding a polyvinyl alcohol, a styrene-butadiene latex and a wax emulsion to the activated clay, it becomes possible to apply it at a high concentration and there are accomplished the maintenance of surface strength of the color developer sheet, the decrease in stains on the blanket and the improvement in sunlight resistance of the colored characters and in the aptitude for pasting.