Lithographic printing method and materials
AssigneeFlint Ink Corporation
InventorsMark D. Latunski, Matthew S. Newman, Dennis R. Gelarden, Graham C. Battersby
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Abstract
A conditioner composition for a printing plate with metallic non-print areas on the printing surface contains a polymeric or oligomeric component. The polymeric component adheres to the metal (particularly, aluminum) surface of the non-print area(s) of the printing member, and has a hydrophilic portion. The conditioned printing plate is particularly useful for printing single fluid inks having an emulsified hydrophilic fluid phase.
Claims21
A method of conditioning a printing plate having a printing surface comprising one or more metal oxide non-image areas and at least one oleophilic image area, comprising a step of applying to the printing surface comprising the one or more metal oxide non-image areas and the at least one oleophilic image area a conditioner composition comprising a polymeric portion comprising functionality that adheres to the one or more non-image areas and further comprising a hydrophilic portion, wherein said conditioner composition forms a durable film in the one or more non-image areas but not in image areas and increases the hydrophilicity of the one or more non-image areas.
A method of conditioning a printing member having a printing surface comprising one or more non-image areas having -M-O-M- groups, wherein M is a metal atom, and at least one oleophilic image area, said method comprising a step of applying to the printing surface comprising the one or more non-image areas and the at least one oleophilic image area a conditioner composition comprising a polymeric portion, wherein said polymeric portion comprises functionality that interacts with the -M-O-M- groups to form a durable film and further wherein the conditioner composition comprises a polymeric portion that increases the hydrophilicity of the one or more non-image areas.
A method of conditioning a printing plate, comprising a step of applying to one or more non-image areas of the printing plate a conditioning composition comprising a polymeric portion, said polymeric portion comprising a hydrophilic portion and a portion that adheres to non-image areas but not to image areas of the printing plate.
A method of conditioning a printing plate, comprising a step of applying to the surface of a printing plate having image areas and non-image areas a conditioning composition comprising a polymeric portion that forms a durable film in only the non-image areas of the printing plate, said film comprising a hydrophilic portion.
A method of treating a printing plate having metal oxide non-image areas, comprising:
- applying to the printing plate having image areas and metallic non-image areas a conditioner composition comprising a polymeric component and forming hydrophilic film therefrom, wherein said polymeric component comprises functionality to adhere the film to non-image areas so that the film is durable in the non-image areas during printing;
- and
- washing the printing plate with a composition comprising a member selected from the group consisting of water, liquid alcohols, and combinations the thereof.
A method of conditioning a printing plate, comprising a step of applying to the printing surface comprising one or more metal oxide non-image areas and at least one oleophilic image area a composition comprising a polymeric portion, wherein the polymeric portion comprises a hydrophilic polymer and comprises functionality selected from the group consisting of aldehyde groups, carboxylic acid groups, phosphorous groups having at least one active hydrogen, sulfonic acids,
- groups, silanol groups, and combinations thereof, wherein a durable film is formed in the non-image areas but not in the image area or areas.
Dependencies are inferred from the claim text.