申请人:SEIKO EPSON CORPORATION
公开号:EP0838508A2
公开(公告)日:1998-04-29
An aqueous ink composition for ink jet printers, which gives reliable printing performance and yields printed images which have excellent print quality and which dry rapidly is disclosed. The ink compositions are suitable for printing on plain paper. The ink comprises water as the principal solvent, an anionic colorant, pectic acid, a base, and at least one of a penetrable solvent and/or a penetrability-imparting surfactant. The pectic acid is composed primarily of α-1,4 linked polygalacturonic acid having a degree of esterification not more than 5% where the degree of esterification is defined as the percentage of the total number of galacturonic acid units in the pectic acid which are esterified.
本发明公开了一种用于喷墨打印机的水性油墨组合物,该组合物具有可靠的打印性能,可打印出打印质量极佳且干燥迅速的图像。这种油墨组合物适用于在普通纸上打印。油墨包括作为主溶剂的水、阴离子着色剂、果胶酸、碱和至少一种可渗透溶剂和/或渗透性促进表面活性剂。果胶酸主要由α-1,4 连接的聚半乳糖醛酸组成,其酯化程度不超过 5%,其中酯化程度定义为果胶酸中酯化的半乳糖醛酸单位总数的百分比。