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US 2006/0234162 A1Published application
Lithographic printing with printing members including an oleophilic metal and plasma polymer layers
AssigneePresstek, Inc.
InventorSonia Rondon
Life of this patent
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Abstract
Printing members that include a plasma polymer layer exhibit enhanced tolerance for high imaging-power densities. The plasma polymer layer may contain or be adjacent to an oleophilic metal such as copper.
Claims24
A method of imaging a lithographic printing member, the method comprising the steps:
- of:
- (a) providing a printing member having an imaging layer, a plasma polymer layer, a metal, and a substrate therebeneath, wherein (i) the imaging layer absorbs imaging radiation, (ii) the plasma polymer layer comprises a plasma-polymerized hydrocarbon, and (iii) the imaging layer and at least one of the plasma polymer layer, the metal and the substrate have opposite affinities for at least one of ink and a liquid to which ink will not adhere;
- (b) exposing the printing member to imaging radiation in an imagewise pattern so as ablate at least a portion of the imaging layer exposed to the imaging radiation;
- and
- (c) removing at least the imaging layer where the lithographic printing member received radiation, thereby creating an imagewise lithographic pattern on the printing member.
2 more elements
The method of claim 8, wherein the metal is disposed above the plasma polymer layer.
A lithographic printing member comprising:
- (a) an imaging layer that absorbs imaging radiation;
- (b) a plasma polymer layer comprising a plasma-polymerized hydrocarbon;
- (c) a metal;
- and
- (d) a substrate beneath the imaging and plasma polymer layers,
- wherein the imaging layer and at least one of the plasma polymer layer, the metal and the substrate have opposite affinities for at least one of ink and a liquid to which ink will not adhere.
3 more elements
Dependencies are inferred from the claim text.