| 摘要 |
PURPOSE:To obtain a developing sheet for pressure sensitive copying paper making use of a developer having a sufficient resistance to water or plasticizer, by containing a metallized substance of a co-condensation resin consisting of salicylic acid, mesitylene, p-substituted phenol, and alpha,alpha'-dialkoxy-p-xylene. CONSTITUTION:A developing sheet for pressure sensitive copying paper containing a metallized substance of a co-condensation resin consisting of salicyl ic acid, mesitylene, p-substituted phenol, and alpha,alpha'-dialkoxy-p-xylene as a devel oper. To produce the developer, the mesitylene is used 0.1-15 in mole ratio to 1mol of salicylic acid, and the p-substituted phenol is used 0.1-15 in mole ratio to 1mol of salicylic acid, and the alpha,alpha'-dialkoxy-p-xylene is used 0.1-1.0 in mole ratio to 1mol of the three mixed ingredients of the salicylic acid, the mesitylene, and the p-substituted phenol. The developing sheet is free from the yellowing caused by a light and a gas such as nitrogen oxide in air, and develops in image stable to light, plasticizer, etc. without reduction in coloring density and has a good resistance to water. |
