Resin composition for laser engraving, relief printing plate precursor for laser engraving, relief printing plate and method of producing the same

A relief printing plate precursor for laser engraving, comprising:

• a relief forming layer including a resin composition, the resin composition comprising:
• an acetylene compound;
• a binder polymer;
• a polymerizable compound;
• and
• a photothermal conversion agent which is capable of absorbing light in a wavelength range of 700 to 1300 nm, wherein the photothermal conversion agent comprises carbon black,
• wherein each of the acetylene compound, the binder polymer, the polymerizable compound and the photothermal conversion agent is a different component of the resin composition, and
• wherein the acetylene compound includes a carbon-carbon triple bond positioned at an end of a molecule of the acetylene compound or two carbon-carbon triple bonds positioned at an interior of a molecule of the acetylene compound.