Presensitized plate and lithographic printing method
A technology of pre-sensitized plate and lithographic printing plate, applied in lithographic printing equipment, printing, printing process, etc., to achieve the effect of excellent on-machine developability
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preparation example Construction
[0078] The lithographic printing plate support used in the presensitized plate of the present invention can be obtained by forming at least an anodized layer on the above-mentioned aluminum plate, followed by sealing treatment, but the preparation method may also include various other steps.
[0079] Preferably, the aluminum plate undergoes a degreasing step to remove roll oil adhering to the surface of the plate; a desmearing step to dissolve stains on the surface of the plate; a graining treatment step to roughen the surface of the plate; forming an anodized layer on the surface; and sealing treatment to seal micropores in the anodized layer, thereby obtaining a lithographic printing plate support.
[0080] It is preferred that the preparation of the lithographic printing plate support used in the present invention comprises an electrochemical graining treatment in which an alternating current is electrochemically applied to a grained aluminum plate in an acidic aqueous solut...
specific example
[0302] Specific examples include Brilliant Green, Ethyl Violet, Methyl Green, Crystal Violet, Basic Fuchsin, Methyl Violet 2B, Naphthalene Red, Rose Bengal, Metamine Yellow, Thymol Blue, Xylenol Blue, Methyl Orange, Paramethyl Red, Congo Red, Benzopurple 4B, α-Naphthyl Red, Nile Blue 2B, Nile Blue A, Methyl Violet, Malachite Green, Paramagenta, Victoria Pure Blue BOH( Prepared by Hodogaya Chemical Co., Ltd.), Oil Blue #603 (Orient Chemical Industries), Oil Pink #312 (Orient Chemical Industries, Ltd.), Oil Red 5B (Orient Chemical Industries), Oil Scarlet #308 (Orient Chemical Industries ), Oil Red OG (Orient Chemical Industries), Oil Red RR (Orient Chemical Industries), Oil Green #502 (Orient Chemical Industries), Spiron Red BEH Special (Hodogaya Chemical), m-cresyl violet, cresyl red, rhodamine B, Rhodamine 6G, Sulphorhodamine B, Huai Huang, 4-p-diethylaminophenyliminonaphthoquinone, 2-carboxyanilino-4-p-diethylaminophenyliminonaphthoquinone , 2-Carboxystearylamino-4-p-N, N-d...
Embodiment 1 to 40
[0383] Examples 1 to 40, and Comparative Examples 1 to 5
[0384] The aluminum plate described below is continuously subjected to graining treatment, anodizing treatment, sealing in this order shown in Table 1 (here, "graining treatment" is used in a broad sense, that is, also includes alkaline etching treatment and desmutting treatment) treatment and hydrophilic treatment, thereby obtaining a lithographic printing plate support. In Table 1, a dash ("-") indicates that the particular surface treatment described was not performed.
[0385] Aluminum plate:
[0386] By using 0.07% by weight of silicon, 0.27% by weight of iron, 0.025% by weight of copper, 0.001% by weight of manganese, 0.000% by weight of magnesium, 0.001% by weight of chromium, 0.003% by weight of zinc and 0.020% by weight of titanium , and the rest is an aluminum alloy composed of aluminum and negligible impurities to prepare a melt. The melt was subjected to molten metal treatment and filtration, and then ca...
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Abstract
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