摘要:
A planographic printing plate material including a support having thereon a photosensitive layer containing: (A) a photopolymerization initiator; (B) a polymer binder; (c) a polymerizable compound having an ethylenically unsaturated bond; and (D) an anionic dye, wherein the photopolymerization initiator is a metal-arene complex, and the anionic dye has a solubility in methyl ethyl ketone of not less than 1 weight % based on the total weight of methyl ethyl ketone.
摘要:
Disclosed is a planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer and an overcoat layer in that order, wherein the light sensitive layer contains (a) an alkali soluble polymer, (b) a polymerizable compound having an ethylenically unsaturated bond, (c) a polymerization initiator, and (d) an anionic dye represented by the following formula (1),
摘要:
Disclosed is a negative working light sensitive planographic printing plate material comprising a support and provieded thereon, a light sensitive layer containing a spectral sensitizing agent, a polymerization initiator, a polymerizable compound, and a polymer as a polymeric binder, wherein the polymer has in the molecule a monomer unit with a polymerizable group and at least one of a polyvinyl ether chain, a polyvinyl pyrrolidone chain and a polyvinyl caprolactam chain.
摘要:
Disclosed is a process of preparing a planographic printing plate from a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, an image formation layer containing (A) a polymerization initiator selected from an arene-iron complex and a tribromoacetyl compound, (B) a polymerizable ethylenically unsaturated compound, and (C) an alkali soluble resin with an acid value of 5 to 200, the process comprising the steps of imagewise exposing the light sensitive planographic printing plate material to ultraviolet light using an exposure device comprising a digital mirror device (DMD), and removing an image formation layer at non-exposed portions with an aqueous alkali solution to form an image.
摘要:
Disclosed is a planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer and an overcoat layer in that order, wherein the light sensitive layer contains (a) an alkali soluble polymer, (b) a polymerizable compound having an ethylenically unsaturated bond, (c) a polymerization initiator, and (d) an anionic dye represented by the following formula (1),
摘要:
The present invention provides a novel ethylenically unsaturated compound which is highly sensitive to scanning exposure due to an ultraviolet to near-infrared laser and is cured to give good physical properties; a light sensitive composition providing good developability and high sensitivity and forming a high strength layer; a planographic printing plate material having advantages that good developability, high sensitivity and high strength layer are obtained, particularly a planographic printing plate material requiring no developing machine which are mounted on a printing press without any development, followed by printing and which provides excellent developability on a printing press and printing durability; and a printing process. The ethylenically unsaturated compound has in the molecule a photo-oxidation group and a polymerizable ethylenically unsaturated bond, and has a predetermined solubility in water or an aqueous alkali solution. The planographic printing plate material is characterized in that it comprises a support and provided thereon, a light sensitive layer containing the ethylenically unsaturated compound, a polyhalogen compound as a photopolymerization initiator, a water-soluble polymer binder as a polymer binder and an infrared absorbing agent.
摘要:
Disclosed is a light sensitive planographic printing plate material comprising a support and provided thereon, a light sensitive layer containing a polymeric binder, a polymerizable ethylenically unsaturated compound and a photopolymerization initiator, wherein the polymeric binder is a polymer having a acid value of from 40 to 120 and a glass transition temperature Tg of from 105 to 200 ° C.
摘要:
Disclosed is a light sensitive planographic printing plate material comprising a support and provided thereon, a light sensitive layer, wherein the light sensitive layer contains a polymerizable ethylenically unsaturated compound, a photopolymerization initiator, a polymeric binder, a sensitizing dye, and a copolymer having a first unit represented by formula (1), a second unit represented by formula (2) and a third unit represented by formula (3), Formula (1) Formula (2)
摘要:
Disclosed is a planographic printing plate material comprising a support and provided thereon, a photopolymerizable light sensitive layer and a protective layer in the order, wherein the protective layer contains a polyvinyl alcohol derivative A having a saponification degree of 90 to 100 mol % and a solubility of 0.1 to 10 g per liter of 50° C. water, and wherein a viscosity at 20° C. of an aqueous solution containing 4% by weight of the polyvinyl alcohol derivative, measured according to JIS K6726, is from 4.5 to 200 mPa·s.
摘要:
A planographic printing plate material including a support having thereon a photosensitive layer containing: (A) a photopolymerization initiator; (B) a polymer binder; (c) a polymerizable compound having an ethylenically unsaturated bond; and (D) an anionic dye, wherein the photopolymerization initiator is a metal-arene complex, and the anionic dye has a solubility in methyl ethyl ketone of not less than 1 weight % based on the total weight of methyl ethyl ketone.