| 摘要 |
PURPOSE:To suppress a migration phenomenon on a printing surface and prevent discoloration, fading or bleeding of printed images, by using a specified ether as a desensitizing agent to prepare an ink from the micture of a desensitizing agent and a pigment, a binder, an organic solvent or the like. CONSTITUTION:A desensitizing composition for pressure sensitive paper comprises a compound of general formula (I), wherein n is an integer of 7-25, and R is an integer of 5-18 carbon atoms. As the compound, for example, at least one of polyoxyethylene amylmethyl ether, polyoxyethylene caprylmethyl ether and the like is preferably used in an amount of 25-80 wt.% as solid components in an ink. As a pigment, at least one of magnesium oxide, calcium oxide and the like is used. As a binder, at least one of a phenolic resin, a rosin- modified phenolic resin and the like is used. AS an organic solvent, at least one selected from alcohols such as methanol and ethanol and ketones such as acetone and methyl ethyl ketone is used. |
