公开(公告)号：US20030200886A1

公开(公告)日：2003-10-30

申请号：US10421162

申请日：2003-04-23

Applicant: AGFA-GEVAERT

Inventor： Joan Vermeersch ,  Dirk Kokkelenberg ,  Philip John Watkiss ,  Klaus Joerg

IPC: B41N001/08

CPC classification number: B41N3/038 ,  B41C1/1025 ,  B41C2210/04 ,  B41C2210/08 ,  B41C2210/22 ,  B41C2210/24 ,  B41N1/083 ,  B41N3/036

Abstract: A negative-working lithographic printing plate precursor is disclosed which comprises a grained and anodized aluminum support having a hydrophilic surface and a heat-sensitive coating provided on the hydrophilic surface, the coating comprising hydrophobic thermoplastic polymer particles which are capable of forming a hydrophobic phase in the coating by heat-induced coalescence of the polymer particles. The support is characterized by a surface roughness, expressed as arithmetical mean center-line roughness Ra, which is less than 0.45 nullm. The smooth surface enables to prepare a lithographic printing plate from the mentioned precursor, which is characterized by a high run length during printing.

Abstract translation: 公开了一种负性平版印刷版原版，其包含具有亲水表面的颗粒和阳极氧化的铝载体，以及设置在亲水表面上的热敏涂层，该涂层包含能够形成疏水相的疏水性热塑性聚合物颗粒 通过聚合物颗粒的热诱导聚结涂覆。 该载体的特征在于表面粗糙度，表示为小于0.45μm的算术平均中心线粗糙度Ra。 光滑的表面使得能够从所述前体制备平版印刷版，其特征在于印刷期间的高游程长度。

公开(公告)号：US20030170570A1

公开(公告)日：2003-09-11

申请号：US10379362

申请日：2003-03-04

Applicant: AGFA-GEVAERT

Inventor： Joseph Vander Aa ,  Joan Vermeersch ,  Dirk Kokkelenberg

IPC: G03F007/038

CPC classification number: B41C1/1025 ,  B41C2201/04 ,  B41C2201/14 ,  B41C2210/04 ,  B41C2210/06 ,  B41C2210/10 ,  B41C2210/22 ,  B41C2210/24 ,  G03F7/32 ,  Y10S430/145 ,  Y10S430/146

Abstract: A method of making a lithographic printing plate is disclosed which comprises the steps of providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer and (ii) a coating provided thereon which comprises hydrophobic thermoplastic polymer particles; exposing the coating to heat, thereby inducing coalescence of the thermoplastic polymer particles at exposed areas of the coating; developing the precursor by applying a gum solution to the coating, thereby removing non-exposed areas of the coating from the support. According to the above method, the plate precursor can be developed and gummed in a single step.

Abstract translation: 公开了一种制备平版印刷版的方法，其包括以下步骤：提供平版印刷版前体，其包含（i）具有亲水性表面的或具有亲水层的载体，和（ii）其上提供的包含疏水性的涂层 热塑性聚合物颗粒; 将涂层暴露于热处，从而在涂层的暴露区域引起热塑性聚合物颗粒的聚结; 通过将胶溶液施加到涂层来显影前体，从而从支撑体除去涂层的未曝光区域。 根据上述方法，可以在一个步骤中显影和前胶板前体。