Agfa-gevaert Ag

Agfa-gevaert

Mario Boxhorn

Thomas Leichsenring

Thorsten Lifka

Andreas Elsaesser

Rudolf Zertani

The present invention relates to a photosensitive recording material comprising a base, a photopolymerisable layer and a covering layer containing a mixture of at least one water-soluble or at least water-dispersible polymer and at least one additive, the additive being selected from the group consisting of alkoxylated alkylenediamines, alkoxylated (C -C ) alkanols, phosphoric acid (C -C ) alkyl esters and phosphoric acid (C -C ) alkyl esters and the amount of the additive being in the range of 0.001 to 10.0% by weight, relative to the total weight of the non-volatile components of the covering layer. The present invention also relates to a process for preparing an offset printing plate with this recording material.

Photosensitive recording material provided with a covering layer

The invention relates to a developer concentrate which comprises water, at least one agent which is alkaline in water and an amphoteric surfactant and additionally at least one anionic surfactant, at least one complexing agent, at least one aminoalcohol and at least one N-alkoxylated mono- or polyfunctional amine. A ready-to-use developer can be prepared from this concentrate by dilution with tap water advantageously in the ratio of from 1:0.5 to 1:10, preferably in the ratio of from 1:2 to 1:6. The developer or the replenisher is preferably used in the production of printing plates.

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Mainz, Germany

Mario Boxhorn