Abstract: A photopolymerizable composition comprising (A) an ethylenically unsaturated compound, (B) a cyanine dye and (C) a photopolymerization initiator, wherein the cyanine dye of component (B) is a cyanine dye of a structure having hetero atoms connected via a polymethine chain, and the polymethine chain has at least one substituent of the following formula (.alpha.): ##STR1## wherein Q.sup.1 and Q.sup.2 are optional substituents, which may be connected to form a ring.

Abstract: A positive photosensitive composition comprising an alkali-soluble organic high molecular substance having phenolic hydroxyl groups and an acid color forming dye.

Abstract: A radiation sensitive composition comprising a film-forming resin and a bis(sulfonyl)diazomethane compound of the following formula (1) or (2): ##STR1## wherein each of R.sup.1 and R.sup.3 is a linear, branched or cyclic alkyl group which may be substituted, R.sup.2 is a halogen atom, an alkoxy group which may be substituted, a nitro group, a cyano group, a nitrile group or an amide group, and each of R.sup.4, R.sup.5 and R.sup.6 which are independent of one another, is a linear, branched or cyclic alkyl group which may be substituted, a halogen atom, an alkoxy group which may be substituted, a nitro group, a cyano group, a nitrile group or an amide group.

Abstract: A photopolymerizable composition for a color filter, which comprises a compound having at least one ethylenically unsaturated double bond, a photopolymerization initiator, and a red, green or blue colorant and which, when formed into a coating film having a dried film thickness of at most 1 .mu.m, has an optical density of at least 1.1.