Kodak Polychrome Graphics, Gmbh

Kodak Graphic Communications Gmbh

Eastman-kodak Company

Other

Ulrich Fiebag

Hans-Joachim Timpe

Harald Baumann

Bernd Strehmel

Uwe Tondock

Andreas Vihs

Celin M Savariar-Hauck

Tanja Ebhardt

Gerhard Hauck

Christopher D Simpson

Dietmar Frank

Mathias Jarek

Philip John Watkiss

Detlef Pietsch

Ursula Muller

Oliver Piestert

Friederike Von Gyldenfeldt

Ulrike Dallmann

Uwe Todock

Anfreas Vihs

Tondock Uwe

A method is described for producing an imaged lithographic printing plate, wherein the developer comprises a hydrophilic polymer comprising (m1) structural units derived from at least one compound comprising both a polyalkylene oxide chain and a free radical polymerizable group, and (m2) structural units derived from at least one compound copolymerizable with the free radical polymerizable group of (i) and comprising at least one functional group with pK&#x3c;5.

Method for developing and sealing of lithographic printing plates

Method for producing an imaged lithographic printing plate comprising the step of developing an imagewise exposed negative working precursor with a developer comprising an alkylene oxide derivative of formula (A), wherein Ris a linear or branched Cto Calkyl group or H, (n+m) is an integer from 2 to 30, and RRRand Rare each independently selected from H, methyl and ethyl, with the proviso that at least one of Rand Ris not H, and with the further proviso that at least one of Rand Ris not H. 

Method for making lithographic plates

Method is described for producing an imaged lithographic printing plate from a precursor comprising a free-radical polymerizable coating and an oxygen-impermeable overcoat, characterized in that removing the overcoat, developing and gumming is carried out in one single step.

Method for processing of photopolymer printing plates with overcoat

Process for the posttreatment of an imaged lithographic printing plate comprising (a) providing a lithographic printing plate comprising image areas and non-image areas on a lithographic substrate; (b) bringing the lithographic printing plate of step (a) into contact with a solution comprising a hydrophilic polymer comprising structural units derived from the following compounds: (i) a compound comprising both polyalkylene oxide chains and at least one structural unit which is free-radical polymerizable, and (ii) a monomer capable of copolymerizing with the free-radical polymerizable structural unit of (i) and furthermore comprising at least one acidic functional group with pK&#x3c;5, wherein the acidic functional group can be present as a free acid group or in the form of a salt; (c) drying.

Method for making a lithographic plate

A process for the post-treatment of an imaged lithographic printing plate comprises (a) Contacting a lithographic printing plate having image areas and non-image areas on a lithographic substrate with a solution comprising at least one phosphono-substituted siloxane of the following general formula (I) that is defined herein and (b) drying. 

Lithographic substrate comprising (a) a dimensionally stable plate- or foil-shaped support, (b) an aluminum oxide layer provided on at least one side of the support (a), and (c) a hydrophilic layer applied onto the aluminum oxide layer comprising at least one phosphono-substituted siloxane of the general formula (I). 

Interlayer for lithographic printing plates

Phosphono-substituted siloxanes suitable as interlayer material in lithographic substrates and for post-treating developed lithographic printing plates, obtainable by reacting (a) a first organosilicon compound of the general formula (I) and (b) a second organosilicon compound of the general formula (II).

Material for the treatment of lithographic substrates and lithographic printing plates

A method and an apparatus for the refreshment and reuse of loaded developers used in lithographic printing are disclosed. The pH of an aqueous, essentially silicate-free loaded developer is reduced to below about 11. Insoluble material is separated, and the pH increased to about 12.0 to 14.0 to produce a refreshed developer. The refreshed developer may be used to develop additional exposed printing plate precursors.

Method and apparatus for refreshment and reuse of loaded developer

A method for the refreshment and reuse of loaded developers used in lithographic printing is disclosed. A polyoxyalkylene derivative is added to a silicate-containing loaded developer. Insoluble material is separated and the alkalinity level of the resulting essentially colorless liquid adjusted to produce a refreshed developer. The refreshed developer may be used to develop additional exposed imageable elements.

Method for reuse of loaded developer

Additive composition for both rinse water recycling in water recycling systems and simultaneous surface treatment of lithographic printing plates

An aqueous developer for lithographic printing plates and a method for developing the printing plates are disclosed. The developer comprises an organic dispersing agent. The developer develops multi-layer printing plates quickly, with high throughput, but with no sludge formation in the developing process.

Aqueous developer for lithographic printing plates

Method of processing lithographic printing plate precursors

Developer for alkaline-developable lithographic printing plates

Positive-working imageable elements and methods for their preparation are disclosed. The elements comprise a hydrophilic substrate; a bottom layer, which contains a positive-working photosensitive composition; and a protective overlayer, which has an overlayer material that reduces the solubility of the photosensitive composition in an aqueous alkaline developer. The overlayer may be conveniently applied by a dip and rinse procedure.

Imageable element having a protective overlayer

A replenisher composition developing exposed radiation-sensitive printing plate precursors for plate/developer systems in which the electrical conductivity of the developer does not decrease to the same extend as the activity of the developer decreases or even increases is disclosed. A method for developing exposed radiation-sensitive printing plates using the replenisher composition is also disclosed.

Growing community of inventors

Nienstadt, Germany

Ulrich Fiebag