A printing defect of offset lithography characterized by a faint duplicate of a printed impression out of register with the solid image, caused by prekissing, or the premature contact of the paper and the printing blanket before the true impression is made. Prekissing can be caused by such things as paper deformations and static electricity. (See also Prekissing and Slurring.)

In die-stamping or foil stamping, a defect characterized by a doubled impression caused by successive stamping operations which do not accurately register the second impression over the first.

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