公开(公告)号：EP2804911B1

公开(公告)日：2018-09-05

申请号：EP12708700.5

申请日：2012-01-16

申请人： HP Indigo B.V.

发明人： BAR-HAIM, Gil ,  OFIR, Amir ,  MOR, Ilanit ,  GRISHMAN, Alina ,  TEISHEV, Albert

IPC分类号： B41J2/21 ,  B41J2/41 ,  B65B3/00 ,  B65D85/00 ,  C09D11/02 ,  C09D11/033 ,  C09D11/037 ,  G03G9/13 ,  G03G9/135

CPC分类号： C09D11/02 ,  B41J2/2107 ,  B41J2/41 ,  B65B3/00 ,  B65D85/70 ,  C09D11/033 ,  C09D11/037 ,  G03G9/131 ,  G03G9/135 ,  G03G9/1355

摘要： Described herein is a method for electrostatic printing including: (i) providing an ink composition having: a hydrocarbon carrier liquid and particles includes a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition; (ii) adding a charge director to the ink composition, such that the total amount of charge director in the ink composition is at least 0.6 mg per g of solids in the ink composition, and, (iii) within a predetermined time of adding the charge director, printing the ink onto a print medium in an electrostatic printing process, wherein the predetermined time is 90 minutes or less.