A layer forming polymer composition comprising: (i) a self-imageable polymer consisting of norbornene-type repeating units and maleic anhydride-type repeating units where (a) such norbornene-type repeating units are represented by Formula Ia, which are derived from norbornene-type monomers represented by Formula I: where m is 0, 1 or 2, each R 1, R 2, R 3 and R 4 for the said first type of repeating unit is independently a hydrogen or a hydrocarbyl pendent group having high transparency in the visible light spectrum; and (b) such maleic anhydride-type repeating units are represented by one or more of Formulae IIa, IIb and IIc, which are derived from maleic anhydride monomer represented by Formula II: where R 5 and R 6 are each independently one of hydrogen, methyl, ethyl, a fluorinated or perfluorinated methyl or ethyl, a linear or branched C 3 -C 9 hydrocarbyl group; a linear or branched fluorinated or perfluorinated C 3 -C 9 hydrocarbyl group; a C 6 -C 18 substituted or unsubstituted cyclic or polycyclic hydrocarbyl group, where R 5 and R 6 are the same or different hydrocarbyl; (ii) a photo active compound selected from: and where D and Q are selected from or a hydrogen atom; (iii) an epoxy resin comprising at least two epoxy groups; and (iv) a solvent. (i) a self-imageable polymer consisting of norbornene-type repeating units and maleic anhydride-type repeating units where (a) such norbornene-type repeating units are represented by Formula Ia, which are derived from norbornene-type monomers represented by Formula I: where m is 0, 1 or 2, each R 1, R 2, R 3 and R 4 for the said first type of repeating unit is independently a hydrogen or a hydrocarbyl pendent group having high transparency in the visible light spectrum; and (b) such maleic anhydride-type repeating units are represented by one or more of Formulae IIa, IIb and IIc, which are derived from maleic anhydride monomer represented by Formula II: where R 5 and R 6 are each independently one of hydrogen, methyl, ethyl, a fluorinated or perfluorinated methyl or ethyl, a linear or branched C 3 -C 9 hydrocarbyl group; a linear or branched fluorinated or perfluorinated C 3 -C 9 hydrocarbyl group; a C 6 -C 18 substituted or unsubstituted cyclic or polycyclic hydrocarbyl group, where R 5 and R 6 are the same or different hydrocarbyl; (a) such norbornene-type repeating units are represented by Formula Ia, which are derived from norbornene-type monomers represented by Formula I: where m is 0, 1 or 2, each R 1, R 2, R 3 and R 4 for the said first type of repeating unit is independently a hydrogen or a hydrocarbyl pendent group having high transparency in the visible light spectrum; and (b) such maleic anhydride-type repeating units are represented by one or more of Formulae IIa, IIb and IIc, which are derived from maleic anhydride monomer represented by Formula II: where R 5 and R 6 are each independently one of hydrogen, methyl, ethyl, a fluorinated or perfluorinated methyl or ethyl, a linear or branched C 3 -C 9 hydrocarbyl group; a linear or branched fluorinated or perfluorinated C 3 -C 9 hydrocarbyl group; a C 6 -C 18 substituted or unsubstituted cyclic or polycyclic hydrocarbyl group, where R 5 and R 6 are the same or different hydrocarbyl; where R 5 and R 6 are each independently one of hydrogen, methyl, ethyl, a fluorinated or perfluorinated methyl or ethyl, a linear or branched C 3 -C 9 hydrocarbyl group; a linear or branched fluorinated or perfluorinated C 3 -C 9 hydrocarbyl group; a C 6 -C 18 substituted or unsubstituted cyclic or polycyclic hydrocarbyl group, where R 5 and R 6 are the same or different hydrocarbyl; (ii) a photo active compound selected from: and where D and Q are selected from or a hydrogen atom; (iii) an epoxy resin comprising at least two epoxy groups; and (iv) a solvent.