| 摘要 |
PURPOSE:To prevent natural coloration during preservation of an ink by using nonvolatile and nondrying oil at ordinary temperature as the solvent for a heat- sensitive ink. CONSTITUTION:Transparent or light colored coloration material such as crystal violet lactone and coloration component of phenolic material such as bisphenol are dispersed with a binder to fix the contents of the ink on the paper after painting, and the additive, pigment, or the like to prevent natural coloration during preservation, where the nonvolatile and nondrying solvent at ordinary temperature such as mineral oil is used as the base. This solvent is painted to the necessary part of the recording paper by roller just before printing. A polymer soluble in said solvent is blended in the base oil where polyethylene elastmer is employed in case of mineral oil. As the nonvolatile and nondrying solvent is used as the base of vehicle, the hardening of the ink can be prevented. |
