a faulty impression created on an <#engraving=engraved> <#plate> when too much pressure is applied to a <#tranroll=transfer roll>, causing the <#plate> to move slightly forward in the <#tranpress=transfer press>. As a result, the subsequent <#rocking=rocking-in> of the transfer roll will not match exactly with the first impression and the lines are doubled at the forward edge of the <#design>.