Global patent index - EP 0986484 A1

EP 0986484 A1 2000-03-22 - METHOD OF PREPARING A PRINTING PLATE

Title (en)

METHOD OF PREPARING A PRINTING PLATE

Title (de)

VERFAHREN ZUR HERSTELLUNG EINER DRUCKPLATTE

Title (fr)

PROCEDE DE PREPARATION D'UNE PLANCHE D'IMPRESSION

Publication

EP 0986484 A1 (EN)

Application

EP 98929438 A

Priority

  • EP 9803480 W
  • GB 9711392 A

Abstract (en)

[origin: GB2325890A] A method for preparing a lithographic printing plate which involves providing a plate precursor comprising a grained and anodised aluminium substrate coated with a metallic layer, preferably a silver layer, imagewise exposing this precursor by means of a high intensity laser beam to remove the metallic layer in the exposed areas and treating the exposed surface of the plate with a chemical composition in order to enhance the oleophilic character of image areas and the hydrophilic character of non-image areas. The method provides press ready plates showing high image quality, good press properties and high durability on press, whilst eliminating the requirement of the use of intermediate film and developer chemistry. The composition preferably comprises an enzyme, an oleophilic agent such as mercapto compound or a cationic surfactant, and a desensitiser such as gum arabic, dextrin or a carbohydrate.

IPC 1-7 (main, further and additional classification)

B41N 1/08; B41C 1/10

IPC 8 full level (invention and additional information)

B41C 1/10 (2006.01); B41N 1/08 (2006.01); G03F 7/00 (2006.01)

CPC (invention and additional information)

B41N 1/083 (2013.01); B41C 1/1033 (2013.01)

Citation (search report)

See references of WO 9855331A1

Designated contracting state (EPC)

DE FR GB IT NL

EPO simple patent family

GB 2325890 A 19981209; GB 9811833 D0 19980729; EP 0986484 A1 20000322; GB 9711392 D0 19970730; JP 2002508717 A 20020319; WO 9855331 A1 19981210

INPADOC legal status

2001-09-26 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20010323

2000-11-22 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20000912

2000-03-22 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000105

2000-03-22 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT NL