公开(公告)号：EP2149072A1

公开(公告)日：2010-02-03

申请号：EP08759565.8

申请日：2008-05-14

Applicant: Agfa Graphics N.V.

Inventor： GRIES, Willi-Kurt ,  HENDRIKX, Peter ,  VAN DAMME, Marc

IPC: G03F7/32

CPC classification number: G03F7/32

Abstract: A gum solution is provided which comprises a film- forming hydrophilic polymer or surfactant, and a salt formed by reaction of an acid, selected from phosphoric acid and phosphorous acid, with a di- or tri-alkanolamine. The gum solution is suitable for developing and gumming a lithographic photopolymer printing plate precursor. Also provided is a method for preparing a lithographic printing plate wherein this gum solution is used, and whereby printing plates are obtained which exhibit an improved clean-out performance.

Abstract translation: 提供包含成膜亲水聚合物或表面活性剂和通过选自磷酸和亚磷酸的酸与二或三链烷醇胺反应形成的盐的胶溶液。 该胶溶液适用于显影和涂胶平版印刷光聚合物印刷版前体。 还提供了一种用于制备其中使用该胶溶液的平版印刷版的方法，并且由此获得展现出改善的清除性能的印刷版。

公开(公告)号：EP2149071A1

公开(公告)日：2010-02-03

申请号：EP08759631.8

申请日：2008-05-15

Applicant: Agfa Graphics N.V.

Inventor： HENDRIKX, Peter ,  GRIES, Willi-Kurt ,  VAN DAMME, Marc

IPC: G03F7/09 ,  G03F7/30

CPC classification number: G03F7/092 ,  B41C1/1016 ,  B41C2201/02 ,  B41C2201/04 ,  B41C2201/14 ,  B41C2210/04 ,  B41C2210/06 ,  B41C2210/08 ,  B41C2210/22 ,  B41C2210/24 ,  G03F7/3035

Abstract: A method for making a lithographic printing plate precursor is disclosed comprising the steps of a. providing a lithographic printing plate precursor including a support having a hydrophilic surface or which is provided with a hydrophilic layer, a photopolymerizable coating comprising a photopolymerizable composition, and an overcoat layer comprising a water soluble low molecular weight acid, wherein said overcoat layer has a surface pH-value ranging between 1 to 6; b. image-wise exposing the precursor; c. optionally heating the exposed precursor; d. processing the obtained precursor by applying a gum solution and optionally brushing the precursor, and/or by mounting the precursor on a plate cylinder of a lithographic printing press and rotating the plate cylinder while feeding dampening liquid and/or ink to the coating. The printing plate obtained after imaging and processing in an off-press configuration with a gum solution or in an on-press configuration with fountain solution and ink shows an improved roll-up performance in the start-up of a printing process on a printing press.

公开(公告)号：EP1765592B1

公开(公告)日：2009-01-28

申请号：EP05756855.2

申请日：2005-07-01

Applicant: Agfa Graphics N.V.

Inventor： VERMEERSCH, Joan ,  LOCCUFIER, Johan ,  CALLANT, Paul ,  JUNG, Jürgen ,  VAN DAMME, Marc

IPC: B41C1/10

CPC classification number: B41C1/1008 ,  B41C1/1025 ,  B41C2210/04 ,  B41C2210/08 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/26

Abstract: A method for making a negative-working heat-sensitive lithographic printing plate precursor is provided which comprises the steps of (i) providing a support having a hydrophilic surface or which is provided with a hydrophilic layer, and (ii) applying on said support a coating which comprises a product DQ, wherein DQ is obtained by - the step of coating a solution or dispersion comprising a nucleophilic compound Q and a dye D selected from the list consisting of di- or tri-arylmethane dyes, cyanine dyes, styryl dyes and merostyryl dyes; or by - the step of coating a solution or dispersion comprising said compound Q and coating another solution or dispersion comprising said dye D; wherein D and Q interact to form interaction product DQ, having a white light optical density which is lower than the white light optical density of dye D, and wherein said interaction product DQ is capable of at least partially releasing a dye directly after exposure to infrared light or heat, thereby forming a visible image in said coating.