Sericol Limited

Fereidoun Abbasi

Nigel P Gould

Peter Dickinson

Julie E Pratt

A water-based, UV-curable ink for plastic substrates, comprising:

Printing ink

Photopolymerizable grafted polyvinyl alcohols including groups of formula ##STR1## wherein n represents zero or an integer from 1 to 6, m represents zero or 1 (with the proviso that m represents zero when n represents zero), Z together with the nitrogen and carbon atoms to which they are attached represent a heterocyclic ring optionally fused to one or more benzenoid or heterocyclic rings, X.sup.- represents an anion, R' represents an alkyl group, and p represents an integer from 1 to 4. Compositions containing such grafted polyvinyl alcohols, for example for screen printing stencils, have shown high sensitivity to light.

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Margate, United Kingdom

Fereidoun Abbasi