Fujifilm Corporation

Kohei Aizu

Koji Wariishi

Hiroaki Idei

Ryo Nakamura

Akio Mizuno

Keisuke Nogoshi

Taira Murakami

Kyosuke Tsumura

Hiroaki Ide

Tomoki Ochimizu

Provided are a planographic printing plate precursor including: a support; and an image recording layer provided on the support, in which the image recording layer contains an infrared absorbing agent, a polymerization initiator, a polymerizable compound containing a hydrogen bonding group, and a hard polymer particle containing at least one group selected from the group consisting of a urethane group, a urea group, an imide group, an amide group, and a sulfonamide group on the surface of the hard polymer particle, and a number average primary particle diameter of the hard polymer particle is in a range of 0.01 to 1 &#x3bc;m; and a plate-making method for a planographic printing plate obtained by using the planographic printing plate precursor.

Planographic printing plate precursor and plate-making method for planographic printing plate

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. 

Color developing composition, lithographic printing plate precursor, plate making method for lithographic printing plate, and color developer

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Shizuoka, Japan

Kohei Aizu