Patents Assigned to Gastetner Limited
  • Planographic printing plate and process for making the same
    Patent number: 4210081
    Abstract: Planographic printing plates are made by depositing on a support sheet an aqueous mixture comprising a hydroxyl group-containing polymer free from acid groups, an insolubilizing agent, a synthetic polymer containing acid groups and preferably a filler, and then drying the deposited layer.The process can be operated at near ambient temperature to give rapidly and reliably a durable water-insoluble hydrophilic layer.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: July 1, 1980
    Assignee: Gastetner Limited
    Inventor: John H. Croker