Photopolymerisable composition stabilised against conversion into gel

摘要

The composition, which constitutes a printing ink, contains, as photopolymerisable component, an ethylenically unsaturated polyester which tends to gel by autopolymerisation in the presence of the ink pigment. To counteract this tendency, the composition additionally contains copper dibutyldithiocarbamate or a dithiocarbamate of another metal and a compound containing copper, which may be the pigment itself.