Process for preparing improved lithographic printing plates

B - Operations – Transporting – 41 – N

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B41N 3/03 (2006.01)

Patent

CA 2172731

Provided herein is an improved process to prepare lithographic printing plates. An embodiment of the process comprises mechanical graining of the substrate surface, followed by electrochemical graining in an acid medium using a symmetrical alternating current in the range of 10-500 coulombs/dm2, and then conditioning of the surface by treating it with a solution of partially neutralized polyvinylphosphonic acid maintained in a pH range of about 2.5 to 6. Such a process yields lithographic plates with high adhesion, excellent contrast and reduced background toning.

L'invention décrit un procédé amélioré pour la préparation de plaques d'impression lithographiques. Une forme de réalisation du procédé comprend le grainage mécanique de la surface de substrat, suivi d'un grainage électrochimique dans un milieu acide à l'aide d'un courant alternatif symétrique de l'ordre de 10 à 500 coulombs/dm?2¿, puis du conditionnement de la surface par traitement avec une solution d'acide polyvinylsulfonique partiellement neutralisé et maintenu dans une plage de pH de 2,5 à 6 environ. Ce procédé produit des plaques lithographiques présentant une forte adhésion, un excellent contraste et une coloration de fond réduite.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for preparing improved lithographic printing plates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing improved lithographic printing plates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing improved lithographic printing plates will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1838181

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.