RECORDING MATERIAL FOR PRESSURE-SENSITIVE COLOR DEVELOPING SHEET

PURPOSE:To eliminate yellowing and improve a stability of a colored image by a method wherein a compound obtained by condensating a polyethylene glycol with a benzotriazole ultraviolet absorber or a mixture thereof is used in a layer containing a phenol resin as a color developer. CONSTITUTION:As a recording material for pressure-sensitive color developing sheet, in a color developing sheet for no-carbon required copying, a compound obtained by condensating a polyethylene glycol with a benzotriazole ultraviolet absorber or a mixture thereof is used in a layer containing a phenol resin as a color developer. The compound obtained by condensating polyethylene glycol chains has hyrophilic properties, high water dispersibility at a concentration of the order of 1%, and good compatibility with a binder. The compound can be uniformly applied all over the color developing sheet for no-carbon required copying without the separation of the ultraviolet absorber after drying, thus forming a uniformly coated film. In this manner, the yellowing of not only a phenol resin but also the whole color developing sheet caused by the irradiation with a daylight, a fluorescent light, or the like is eliminated, and a color developing sheet for no carbon required copying can be obtained with an improved stability of a colored image and a superior printability.