Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Akira Nogami

Masafumi Uehara

Kazuhiro Shimura

Minoru Seino

Miegi Nakano

Shinya Watanabe

Akio Iwaki

Keiichi Yumiki

Miyuki Shirai

A developing solution of an imagewise exposed, presensitized offset printing plate is disclosed. The developing solution has a pH of at least 12.5, and contains a low content of a silicate in an amount of up to 1.0 wt % as SiO.sub.2, a surfactant in an amount of 0.01 to 10 wt %, an aromatic carboxylic acid in an amount of 0.1 to 10 wt %, and an amine compound represented by the following general formula (I) in an amount of 0.1 to 10 wt %:

Method of developing presensitized offset printing plates and developing

A method of developing a waterless light-sensitive lithographic printing plate having a support and, provided thereon, a light-sensitive layer comprising a diazo resin and a silicone gum layer with a developer is disclosed. The developer comprises an organic carboxylic acid or salt thereof, water, and at least one of a sulfite and a surfactant.

Method for developing a waterless light-sensitive lithographic plate

There are disclosed an aqueous alkaline developer for light-sensitive lithographic printing plate commonly processing a negative-type light-sensitive lithographic printing plate having a light-sensitive layer containing a diazo compound and a positive-type light-sensitive lithographic printing plate having a light-sensitive layer containing an o-quinonediazide compound, which comprises containing an alkali agent, 0.1 to 10% by weight of a water-soluble reducing agent, a sodium, potassium or ammonium salt of an organic carboxylic acid, and a non-ionic or cationic surfactant, and having a pH in the range of 12.5 to 13.5, and also a developer composition for light-sensitive material, which comprises an aqueous solution containing a compound represented by the formula (I) shown below: ##STR1## wherein R.sub.1 represents an alkyl group or an alkoxy group each having 2 to 5 carbon atoms, or a hydroxyalkyl group having 2 to 5 carbon atoms; and R.sub.2 represents a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, an alkyl group, an alkoxy group or a phenyl group.

Developer for light-sensitive lithographic printing plate capable of

An apparatus for processing an imagewise exposed pre-sensitized lithographic printing plate which entails uniformly applying a desired amount of developer, that has not been substantially used to the surface of the printing plate by a developer supply member comprised of two plates and having a slit at the lowermost portion thereof which contacts the surface of the printing plate, and then transferring the plate containing the developer to a developer storage tank, immersing the plate in the developer storage tank, and removing the developer from the plate.

Method of processing pre-sensitized lithographic printing plate and

A method of processing an imagewise exposed pre-sensitize lithographic printing plate which entails uniformly applying a desired amount of developer, that has not been substantially used to the surface of the printing plate by a developer supply member comprised of two plates and having a slit at the lowermost portion thereof, and then transferring the plate containing the developer to a developer storage tank, immersing the plate in the developer storage tank, and removing the developer from the plate.

Methods of processing pre-sensitized lithographic printing plate and

A method and a device of dividing an aqueous processing waste solution of a non-silver halide light-sensitive material into solid and water are disclosed comprising the steps of:

Method of treating an aqueous processing waste solution of a non-silver

Disclosed is a liquid developer for electrophotography wherein the dispersed toner particles have a single peak distribution and the number of particles that are less than 0.06 .mu.m is not greater than 5%, and not more than 3% of the particles are greater than 1.5 .mu.m.

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Hino, Japan

Akira Nogami