Essentially a unique variant of a conventional print. An impression is printed from a reprintable block, such as an etched plate or woodblock, but in such a way that only one of its kind exists, for example by incorporating unique hand-colouring or collage. The term can also refer to etchings which are inked and wiped in an expressive, not precisely repeatable manner; to prints made from a variety of printing elements that change from one impression to the next; or to prints that are painted or otherwise reworked by hand either before or after printing.