Fujifilm Corporation

Taira Murakami

Kyosuke Tsumura

Kotaro Kudo

Kenjiro Araki

Akinori Fujita

Akio Mizuno

Yusuke Namba

Keisuke Nogoshi

Akira Sakaguchi

Kohei Aizu

Yoshiki Morita

Keisho Funatsu

Tadao Shibamoto

Shizuka Ishikawa

An aqueous developer for a flexographic printing plate capable of maintaining good developability and suppressing aggregation of a dispersion in the developer diluted with water after repeated use, and a manufacturing method of a flexographic printing plate using the same, are provided. The aqueous developer for a flexographic printing plate contains a surfactant represented by Formula (1), and water:

Aqueous developer for flexographic printing plate and manufacturing method of flexographic printing plate

Provided is a lithographic printing plate precursor having a support and an image-recording layer on the support, in which the image-recording layer has an infrared absorber, a polymerization initiator, a polymerizable compound 1, a polymerizable compound 2, and a polymerizable compound 3, in which a molecular weight of the polymerizable compound 1 is less than 1,000, a weight-average molecular weight of the polymerizable compound 2 is 1,000 or more and 3,000 or less, and a weight-average molecular weight of the polymerizable compound 3 is more than 3,000 and 15,000 or less.

Lithographic printing plate precursor, method for preparing lithographic printing plate, and lithographic printing method

A lithographic printing plate precursor includes an image recording layer on a support, in which the lithographic printing plate precursor has projections which are discontinuously formed on a surface of an outermost layer on a side where the image recording layer is provided, and a melting point of each projection is in a range of 70&#xb0; C. to 150&#xb0; C. A method of producing a lithographic printing plate includes a step of image-wise exposing the lithographic printing plate precursor to form an exposed portion and an unexposed portion, and a step of supplying at least one of printing ink or dampening water to remove the unexposed portion.

Lithographic printing plate precursor and method of producing lithographic printing plate

A planographic printing plate precursor includes: a support; and an image recording layer which includes a radical initiator, a radical polymerizable component, and a radiation absorption compound, and in which the image recording layer shows two or more peaks of a radical generation amount in a radical generation amount-versus-time curve after exposure to image forming radiation, in which the radical initiator includes an electron-donating radical initiator and an electron-accepting radical initiator, and the radiation absorption compound comprises a compound represented by the following Formula 1. 

Radiation-sensitive composition, planographic printing plate precursor, and plate-making method for planographic printing plate

Provided is a lithographic printing plate precursor having: a support; and an image-recording layer as an outermost surface layer on the support, in which the image-recording layer includes a hydrophilic polymer, an ion intensity derived from the hydrophilic polymer has a maximum value I1, the ion intensity being measured by a time-of-flight secondary ion mass spectrometry in such a manner that cutting is carried out from an image-recording layer surface in a direction of the support by an Ar gas cluster ion beam method, a ratio d0/d1 of a thickness d0 of the image-recording layer to a depth d1 from an outermost layer at which the I1 is obtained is 2.0 or more, and a ratio I1/I0 of the I1 to an ion intensity I0 derived from the hydrophilic polymer at a depth from the outermost layer of the d0 is 1.5 or more.

Lithographic printing plate precursor, method for producing lithographic printing plate, and lithographic printing method

A color developing composition which develops colors in a high density and does not significantly discolor when aged, a lithographic printing plate precursor which has excellent plate-inspecting properties by means of color development and is capable of maintaining strong color development even when aged after color development, a plate making method for a lithographic printing plate in which the lithographic printing plate precursor is used, and a new compound that can be preferably used as a color developer. The color developing composition of the present invention includes a compound represented by Formula 1. The compound in the present invention is represented by Formula 1. In Formula 1, Rrepresents a group in which an R&#x2014;O bond is cleaved by heat or exposure to infrared rays. 

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Shizuoka, Japan

Taira Murakami