Lithographic printing plate precursors and method of use
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United States of America Patent
Stats
-
Nov 10, 2020
Grant Date -
Sep 6, 2018
app pub date -
Mar 2, 2017
filing date -
Mar 2, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Lithographic printing plate precursors are prepared with a unique substrate and one or more radiation-sensitive imageable layers. The substrate is prepared by two separate anodizing processes to provide an inner aluminum oxide layer having an average dry thickness (Ti) of 650-3,000 nm and a multiplicity of inner micropores having an average inner micropore diameter (Di) of ≤15 nm. A formed outer aluminum oxide layer comprises a multiplicity of outer micropores having an average outer micropore diameter (Do) of 15-30 nm; an average dry thickness (To) of 130-650 nm; and a micropore density (Co) of 500-3,000 micropores/μm2. The ratio of Do to Di is greater than 1.1:1, and Do in nanometers and the outer aluminum oxide layer micropore density (Co) in micropores/μm2, are further defined by the outer aluminum oxide layer porosity (Po) according to the following equation:
where Po is 3.14(Co)(Do2)/4,000,000.
First Claim
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International Classification(s)
- 2017 Application Filing Year
- B41N Class
- 87 Applications Filed
- 45 Patents Issued To-Date
- 51.73 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- B41N Class
- 72.92 % this patent is cited more than
- 5 Age
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