Preparation of a flexographic relief printing plate

G - Physics – 03 – F

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G03F 7/32 (2006.01) C11D 3/43 (2006.01) G03F 7/20 (2006.01)

Patent

CA 2050931

A new liquid cleaner composition is provided for the mild and gentle removal of polymeric materials from a surface without leaving any residues. The new cleaner composition is an emulsion of the water-in-oil type comprising an aqueous phase finely dispersed in a continuous phase selected from the group consisting of nonflammable, fire-retardant, high-boiling, and fire-retardant and high-boiling organic phases, the volume ratio of the finely dispersed aqueous phase to the continuous organic phase being in the range of form 90:10 to 10:90. The water-in-oil emulsion can additionally contain alcohols, surface-active compounds and further useful additives. It is preferably used in the process for preparing photopolymerized flexographic relief printing plates as the developer for washing out the non-irradiated and thus non-photopolymerized areas of the imagewise irradiated relief-forming recording layers of the flexographic relief printing plates.

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