公开(公告)号：EP1884372B1

公开(公告)日：2009-10-21

申请号：EP06118360.4

申请日：2006-08-03

Applicant: Agfa Graphics N.V.

Inventor： Verdyck, Dirk ,  Campestrini, Paola ,  De Temmerman, Marc

IPC: B41N3/03

CPC classification number: B41N3/034 ,  C25F3/04

公开(公告)号：EP1884372A1

公开(公告)日：2008-02-06

申请号：EP06118360.4

申请日：2006-08-03

Applicant: Agfa Graphics N.V.

Inventor： Verdyck, Dirk ,  Campestrini, Paola ,  De Temmerman, Marc

IPC: B41N3/03

CPC classification number: B41N3/034 ,  C25F3/04

Abstract: A method for making a lithographic printing plate support is disclosed comprising the steps of: (i) providing an aluminum support; (ii) treating said support in an aqueous solution; (iii) graining said treated support in an electrolyte solution by applying an alternating voltage thereby inducing a local current density J;
characterized in that said local current density J at time t fulfilles the following equation : J t ≤ a + b ⁢ Q t for t = o to t = t f
and wherein
- Q(t) is the integrated value of the absolute value of the local current density at time t: Q t = ∫ 0 t J τ ⁢ d ⁢ τ
- a is equal to 5
- b is equal to 10
- and t f is the time necessary to obtain a value of Q(t) equal to 50 C/dm 2 .

Abstract translation: 公开了一种制备平版印刷版支撑件的方法，包括以下步骤：（i）提供铝支架; （ii）在水溶液中处理所述载体; （iii）通过施加交流电压从而引起局部电流密度J，使所述经处理的载体在电解质溶液中成粒; 其特征在于，在时间t的所述局部电流密度J满足以下等式：对于t = o至t = tf，J t‰a + b ¢Q t，其中-Q（t）是绝对值的积分值 在时间t处的局部电流密度：Q t =α0 t JÄ ¢d ¢Ä - a等于5 - b等于10 - ，tf是获得Q值（t）所需的时间 ）等于50℃/ dm 2。