An imagable copy film comprises a film substrate of a thermoplastics polymeric material with a percentage thermal expansion in the film widthwise direction (TD) at 150° C. of 0.01 to 1.0%, and a percentage thermal shrinkage in the film lengthwise direction (MD) at 150. degree. C. of 0.4 to 2.0%. The substrate has a receiving layer on at least one surface thereof, comprising an acrylic and/or methacrylic resin.
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