| http://www.w3.org/ns/prov#value | - A developer sheet comprising a support having a layer of a color developer on the surface thereof, said color developer being a microparticle capable of reacting with a substantially colorless electron donating color former to produce a color image and being a polymer having a repeating unit of formulae (I), (II) or (III) ##STR11## where R is a hydrogen atom or a methyl group; L is a direct bond o
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