| 摘要 |
<p>A contrast colorant for photopolymerizable composition containing an addition polymerizable photoinitiator and a polymerizable monomer capable of photopolymerization initiated by the photoinitiator, which colorant comprises a leuco triarylmethane dye and a bromine or chlorine substituted neoalkane or cycloalkane as photoactivator for formation of the colored form of the dye. </p> |
