Re-can
Encyclopedia
A re-can is a roll of film stock
Film stock
Film stock is photographic film on which filmmaking of motion pictures are shot and reproduced. The equivalent in television production is video tape.-1889–1899:...

 which was originally opened up from a factory-sealed can and loaded into a camera magazine
Camera magazine
A camera magazine is a light-tight chamber or pair of chambers designed to hold and move motion picture film stock before and after it has been exposed in the camera...

 by a clapper loader
Clapper loader
A clapper loader, or second assistant camera is part of a film crew, whose main functions are that of loading the raw film stock into camera magazines, operating the clapperboard at the beginning of each take, marking the actors as necessary, and maintaining all records and paperwork for the...

, but remained unshot and thus was unloaded back into a film can unused. A re-can will be placed in a black bag in a film can which is then sealed and identified as a re-can, as well as including the film type, emulsion number, and when it was unloaded. Identification is critical, as there may be no other way to know what exactly is inside the can. Re-cans should be sealed in either white or colored gaffer tape
Gaffer tape
Gaffer tape, gaffer's tape, gaff tape or gaffa tape is a strong, tough, cotton cloth pressure sensitive tape with strong adhesive properties. It is used in theater, film and television productions as well as during live performances and any other kind of stage work...

, depending on what (if any) color scheme is being used to identify film types; in any case, black gaffer tape should not be used, as it is considered the standard tape color used to seal exposed cans. If any of the roll has been shot, it is not considered a re-can, but rather a short end
Short end
A short end is a partial roll of unexposed film stock which was left over during a motion picture production, and which is kept for use later....

.

Re-cans are considered distinct from new rolls because they may have been subject to environmental conditions since leaving their originally sealed can and are no longer under factory warranty, and are generally identified distinctly to avoid any confusion in the matter. Assuming proper storage and fast turnaround time, they are considered perfectly usable. Older re-cans or ones of uncertain provenance should be clip tested first to check their condition. Re-cans and short ends are often sold at discounts to lower budget productions by labs, larger production companies, or businesses which specialize in their sale.
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