Part-perforate

Part-perforate - a stamp imperforate on one or more sides, but with at least one side perforated.
Paste-Up - the area where the ends of rolls of coiled stamps are joined with glue or tape.
PCF - acronym for PostCard Factory postal cards.

Part-Perforate: A stamp with all perforations missing on one or more sides, but with at least one side perforated.
Paste-Up: The ends of rolls of coiled stamps joined together with glue or tape.

Part-perforate: A stamp with partial perforations missing especially in sides.
Pen cancelled: Stamps cancelled with a pen or marker.
Perforation: The holes between stamps to which makes separation easy.

Part-perforated - a stamp perforated in one direction only, either horizontally or vertically, and cut apart in the other direction ...

Printing errors include imperforate (stamps printed in sheets without perforation or other means of separation) or part-perforate varieties, missing or incorrect colours and inversion or doubling of part of the design or overprint.

See also: Trans, Postcard, Pane, Sheet, Stamp