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Photosensitive lithographic plate printing plate
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A photosensitive and lithographic technology, applied in printing plates, foils, printing, etc., can solve the problems of insufficient developing range and printing durability
Inactive Publication Date: 2009-07-15
FUJIFILM CORP
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[0012] However, even with the above technology, the development range and printing durability are still not sufficient for the requirements of a plate that can be easily used in various usage conditions
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Embodiment 1～11 and comparative example 1～5
[0202] Coat the following photosensitive liquid on the support with the undercoat layer obtained as above, and dry it in an oven at 150°C for 1 minute to obtain a 2 A positive photosensitive lithographic printing plate with a photosensitive layer.
[0203] (photosensitive liquid)
[0204] m, p-cresol phenolic resin, the amount recorded in Table 1
[0205] (m / p ratio=6 / 4, weight average molecular weight 7,500,
[0262] According to the production procedure of the above-mentioned support (a), the electric quantity of the electrochemical roughening treatment was changed, thereby producing the supports (d) to (h) subjected to the hydrophilic treatment shown in Table 2 with the surface roughness changed.
[0263] [Production of photosensitive lithographic printing plates]
[0264] Use the same primer solution and photosensitive solution as in Example 1, and use the same method to set the primer layer and photosensitive layer on the above-mentioned supports (d) to (h) to make the photosensitive lithography shown in Table 2 printing plate.
[0265] In the same manner as in Examples 1 to 11, the development range and printing durability of the produced photosensitive lithographic printing plates were evaluated. The results are shown in Table 2.
[0266] Table 2
[0267]
[0268] It can be seen from Table 2 that the centerline average rough...
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Abstract
A photosensitive lithographic printing plate having an infrared photosensitive layer containing (A) a resin, (B) a phenolic resin, and (C) a photothermal conversion substance on a support subjected to a hydrophilic treatment. A lithographic printing plate, the resin is at least (1) a monomer having a carboxyl group represented by the general formula (I), and (2) selected from (meth)acrylates, (meth)acrylamide derivatives and styrene The resin in which at least one monomer in the derivative is used as a copolymerization component is characterized in that the support is a support subjected to electrochemical roughening treatment in an acidic aqueous solution mainly composed of hydrochloric acid. According to this photosensitive lithographic printing plate, it is possible to directly make a plate from digital data such as a computer by infrared scanning exposure, and it is excellent in developing range and printing durability.
Description
technical field [0001] The present invention relates to a photosensitive lithographic printing plate, and more specifically, to a so-called positive-working photosensitive lithographic printing plate for direct plate-making that can be directly processed from digital data such as a computer by using an infraredlaser. Background technique [0002] In recent years, lasers have developed rapidly, and especially solid-state lasers and semiconductor lasers, which emit light in the near-infrared region to the infrared region, have become easy-to-obtain high-output compact devices. In the field of lithography, these lasers are very useful as an exposurelight source for direct plate making from digital data such as a computer. [0003] As an image recording material that uses laser light in the near-infrared to infrared range as a light source, JP-A-7-285275 discloses a binder containing benzoquinone in a binder such as cresol resin and a substance that absorbs light and generates...
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