	US 10,525,696 C1 (13,391st)
	Lithographic printing plate precursor, lithographic printing plate manufacturing method, printing method and aluminum support manufacturing method
Ryo Nakamura, Haibara-gun (JP); Atsushi Matsuura, Haibara-gun (JP); and Tsuyoshi Hirokawa, Haibara-gun (JP)
Filed by FUJIFILM CORPORATION, Tokyo (JP)
Assigned to FUJIFILM CORPORATION
Reexamination Request No. 90/015,524, Sep. 23, 2025.
Reexamination Certificate for Patent 10,525,696, issued Jan. 7, 2020, Appl. No. 16/245,505, Jan. 11, 2019.
Claims priority of application No. 2017-210265 (JP), filed on Oct. 31, 2017; and application No. 2018-051237 (JP), filed on Mar. 19, 2018.
Ex Parte Reexamination Certificate issued on Sep. 24, 2026.
Int. Cl. B41C 1/10 (2006.01); B41F 7/00 (2006.01); B41N 1/08 (2006.01); B41N 3/03 (2006.01)

CPC B41C 1/1016 (2013.01) [B41N 1/083 (2013.01); B41C 2210/06 (2013.01); B41C 2210/22 (2013.01); B41C 2210/24 (2013.01); B41C 2210/262 (2013.01); B41F 7/00 (2013.01); B41N 3/034 (2013.01)]

AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:

The patentability of claims 14-20 is confirmed.

New claims 21-32 are added and determined to be patentable.

Claims 1-13 were not reexamined.

14. A lithographic printing plate precursor having an aluminum support and an image recording layer disposed above the aluminum support,

wherein the aluminum support includes an aluminum plate and an anodized film of aluminum formed on the aluminum plate,

[ wherein the anodized film has micropores,]

wherein the image recording layer is positioned on the anodized film side of the aluminum support, and

wherein when measured over a 400 μm×400 μm region of a surface of the aluminum support on the image recording layer side using a three-dimensional non-contact roughness tester, pits with a depth from centerline of at least 0.70 μm are present at a density of at least 3,000 pits/mm²,

wherein each of the micropores has a large-diameter portion which extends from the surface of the anodized film to a depth of 10 to 1,000 nm and a small-diameter portion which communicates with a bottom of the large-diameter portion and extends to a depth of 20 to 2,000 nm from a communication position between the small-diameter portion and the large-diameter portion,

wherein an average diameter of the large-diameter portion at the surface of the anodized film is 15 to 60 nm, and

wherein an average diameter of the small-diameter portion at the communication position is not more than 13 nm.

16. The lithographic printing plate precursor according to claim 14, wherein the ~~anodized film has extending~~ micropores [ extend ] from a surface of the anodized film opposite from the aluminum plate in a depth direction of the anodized film, and

wherein an average diameter of the micropores at the surface of the anodized film is from 10 to 150 nm.

[ 21. The lithographic printing plate precursor according to claim 14,

wherein the pits are formed by a hydrochloric acid electrolyte treatment step including providing an alternating current electrolysis in a hydrochloric acid treatment solution having a sulfuric acid content of 0.1 to 2.0 g/L using a total amount of electricity between 350 to 1,000 C/dm².]

[ 22. The lithographic printing plate precursor according to claim 14,

wherein the pits are formed by a hydrochloric acid electrolyte treatment step including providing an alternating current electrolysis in a hydrochloric acid treatment solution having a sulfuric acid content of 0.2 to 1.5 g/L using a total amount of electricity between 350 to 1,000 C/dm².]

[ 23. The lithographic printing plate precursor according to claim 14, wherein the lithographic printing plate precursor comprises a lithographic printing plate precursor for on-press development.]

[ 24. A method of preparing a lithographic printing plate, comprising:

a step of imagewise-exposing the lithographic printing plate precursor according to claim 14; and

a step of supplying at least any of a printing ink or dampening water to the imagewise-exposed lithographic printing plate precursor and removing an image recording layer in a non-image area on a printing press.]

[ 25. A lithographic printing method comprising:

a step of imagewise-exposing the lithographic printing plate precursor according to claim 14; and

a step of supplying at least any of a printing ink or dampening water to the imagewise-exposed lithographic printing plate precursor and removing an image layer in a non-image area on a printing press; and

a step of performing printing using the obtained lithographic printing plate.]

[ 26. The lithographic printing method of claim 25, wherein a solid press life of the printing plate is between 80,000 and 110,000 impressions evaluated using a standard black ink on a Tokubishi art paper.]

[ 27. The lithographic printing method of claim 25, wherein a tiny dot press life of the printing plate is between 80,000 and 110,000 impressions evaluated using a standard black ink on a Tokubishi art paper.]

[ 28. The lithographic printing method of claim 25, wherein after printing 10,000 impressions using a standard black ink on a Tokubishi art paper, a scumming resistance rating of the printing plate is between 80 and 100.]

[ 29. The lithographic printing method of claim 25, wherein after printing 10,000 impressions using a standard black ink on a Tokubishi art paper, the ink stain area per 1 cm²on a blanket in non-image portions is between 0% and 4%.]

[ 30. The lithographic printing plate precursor according to claim 14, wherein the density of the pits with a depth from centerline of at least 0.70 μm is at least 3,500 pits/mm².]

[ 31. The lithographic printing plate precursor according to claim 14, wherein the density of the pits with a depth from centerline of at least 0.70 μm is at least 3,790 pits/mm².]

[ 32. The lithographic printing plate precursor according to claim 14, wherein the density of the pits with a depth from centerline of at least 0.70 μm is at least 4,000 pits/mm².]