Man Roland Druckmaschinen Ag

Andrea Fuchs

Thomas Hartmann

Josef Schneider

Hans-Christoph Beltle

Roland Dietrich

A thermal transfer sheet suitable for preparing a lighographic printing form cylinder is provided including a substrate layer and a donor layer. The substrate layer includes a first polymer having mechanical stability at temperatures greater than 150 degrees C. and light transmission of at least 70% for wavelengths of from about 700 nm to about 1600 nm. The donor layer includes a second polymer having acidic groups and/or optionally substituted amide groups and an additive is capable of converting incident laser light energy into heat energy. A wetting aid and/or a solvent are also included in the donor layer. A method of making the thermal transfer sheet is also provided.

Thermal transfer sheet for the laser-induced coating of a printing form cylinder

A thermal transfer film or a thermal transfer ribbon includes a substrate layer and a donor layer applied thereto. The substrate layer consists of at least one polymer composition which has mechanical stability at a temperature >150&deg; C. and transmission >70% for light having a wavelength of from 700 to 1600 nm. The donor layer comprises at least the following components: a substance which is able to convert the radiation energy of the incident laser light into heat energy, a polymer which contains acidic groups and/or unsubstituted or substituted amide groups thereof, and optionally a wetting aid. The polymer composition also includes a reactive polymer.

Thermal transfer film comprising a reactive polymer composition for laser-induced coating

A cleaning medium for use in cleaning printing forms includes either an acid solution having a pH of from 1 to 4 or a basic solution having a pH of from 10 to 14. A dispersible abrasive agent in a concentration of from 1 to 15 grams per 100 grams of the cleaning composition, a surfactant in a concentration of from 1 to 50 grams per 100 grams of the cleaning composition, an organic solvent in a concentration of from 10 to 50 grams per 100 grams of the cleaning composition, and additional water if needed are added to the acid or basic solution to form the cleaning medium. A cleaning medium in concentrate form is also provided.

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Augsburg, Germany

Andrea Fuchs