Developing solvent for photopolymerizable printing plates

G - Physics – 03 – F

Patent

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G03F 7/30 (2006.01) G03F 7/32 (2006.01)

Patent

CA 2468239

Flexographic printing plates are produced by exposing the photopolymer plates to a light source and washing out (developing) the masked out, non-exposed areas with a solvent. The invention provides methyl ester solvents suitable for use in the development of photopolymer printing plates. The solvents, which include methyl esters alone or mixed with co-solvents and/or non- solvents, are effective in developing a large number of different photopolymer printing plates and can produce images superior to those obtained with commercially available solvents currently used in such applications.

La présente invention s'adresse des clichés flexographiques pour lesquels, une fois qu'on a exposé à une source de lumière les plaques en photopolymères, on utilise un solvant pour débarrasser (développer) les surfaces non exposées car masquées. L'invention concerne plus particulièrement des solvants à base d'esters méthyliques convenant au développement des clichés en photopolymères. Ces solvants, qui sont constitués d'esters méthyliques pris seuls ou en mélange avec des co-solvants et/ou des non-solvants, conviennent particulièrement pour le développement d'un grand nombre de différents types de clichés en photopolymères. Ils permettent la production d'images de qualité supérieure à celles obtenues avec les solvants du commerce habituellement utilisés pour ce genre d'applications.

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