| http://www.w3.org/ns/prov#value | - The term photopolymerization initiator as used in the present invention refers to a compound which causes decomposition or the cleavage of a bond and forms an active species capable of initiating the polymerization of the above polyfunctional monomer (C), such as a radical, cation or anion, when irradiated with radiation such as visible light, ultraviolet light, far ultraviolet light, electron b
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