Printing
AssigneeJ P Imaging Limited
InventorsJohn David Adamson, Peter Andrew Reath Bennett, Rodney Martin Potts
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Abstract
A method of preparing a printing form precursor for printing, or a printed circuit board precursor or a semiconductor precursor, the method comprising the step of applying electromagnetic radiation having a pulse duration of not greater than 1×10−6 seconds, in an imagewise manner, to an imagable surface of the precursor. The imaging process may cause ablation of the coating of the precursor or permit its development in a developer. In each case the imaging radiation needs not be tuned to imaging chemistry (if any) present in the coating. Alternatively the imaging process may induce a change of hydrophilicity or hydrophobicity, or other change of state, of an uncoated substrate.
Claims8
A method of preparing a printing form precursor for printing, the method comprising the step of applying electromagnetic radiation having a pulse duration of not greater than 1×10−6 seconds and a fluence of at least 100 mJ/cm2, in an imagewise manner, to an imageable surface of the printing form precursor,
- wherein the imageable surface is aluminium oxide.
A printing form having an imageable surface subjected to pulses of electromagnetic radiation of duration not greater than 1×10−6 seconds and a fluence of at least 100 mJ/cm2, with the result that selected portions are ink-accepting and the reciprocal portions are not ink-accepting,
- wherein the imageable surface is aluminium oxide.
Dependencies are inferred from the claim text.