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US 2003/0198890 A1Published application
Planographic printing plate
AssigneeFuji Photo Film Co., Ltd.
InventorsYukio Abe, Kazuto Shimada
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AssigneeFuji Photo Film Co., Ltd.
InventorsYukio Abe, Kazuto Shimada
Estimating the term…
A negative-type planographic printing plate having, disposed on a support, a recording layer comprising an image recording material which contains an infrared ray absorbing agent and can be recorded by irradiation with an infrared ray, in which, as for the infrared ray absorbing agent comprising a cyanine dye, at least one of substituents on nitrogen atoms at both ends was selected from the group consisting of the following substituents: —C(═X)R1; —C(═X)NR2R3; —CH≡CR4R5; —C═CR6; —CHR7R8;—CR9R10R11; and —Ar, wherein X represents O, S or Se; R1 to R6 each independently represent H or a hydrocarbon group having 20 or fewer carbon atoms which may have a substituent; R7 to R11 each independently represent a hydrocarbon group having 20 or fewer carbon atoms which may have a substituent; and Ar represents an aromatic group which may have a substituent.
A negative-type planographic printing plate having, disposed on a support, at least a recording layer comprising a negative-type image recording material on which an image can be recorded by irradiation with an infrared ray, the negative-type image recording material including an infrared ray absorbing agent comprising a cyanine dye in which at least one of substituents on nitrogen atoms at both terminal ends thereof is selected from the group consisting of the following substituents:
Dependencies are inferred from the claim text.
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With photosensitivity-increasing substances, e.g. photoinitiators: inorganic compounds; Onium compounds; Organic compounds having hetero atoms…
For lithographic printing; Master sheets for transferring a lithographic image to the forme: by removal or destruction of lithographic material on…
With photosensitivity-increasing substances, e.g. photoinitiators: organic compounds not covered by group G03F7/029
By removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials…
Term end not estimated
1. Field of the Invention
The present invention relates to negative-type planographic printing plate. More particularly, the invention relates to a negative-type planographic printing plate having, disposed on a support, at least a recording layer comprising a heat-mode compatible, negative-type image recording material usable for a planographic printing plate precursors which is capable of directly forming a printing plate, that is, capable of direct printing plate production by performing scanning with infrared ray lasers in accordance with digital signals outputted from a computer or the like.
2. Description of the Related Art
The examples are given below to illustrate the invention and should not be interpreted as limiting it in any way.
Preparation of Support
A molten metal of an alloy compliant with JIS A1050 which comprises 99.5% or more of aluminum, 0.30% of Fe, 0.10% of Si, 0.02% of Ti and 0.013% of Cu was cast after being subjected to a cleaning treatment. In such cleaning treatment, a degassing treatment was conducted to remove unnecessary gasses such as hydrogen from the molten metal and, then, a ceramic tube filter treatment was conducted. As for a casting method, DC casting method was adopted. The resultant solidified ingot having a plate thickness of 500 mm was faced by a portion of 10 mm thick from a surface thereof and, then, subjected to a homogenizing treatment at 550° C. for 10 hours in order to prevent an intermetallic compound from being agglomerated.