Canon MultiPASS C3500 User Manual page 63

When loading transparencies or back print film, insert one sheet of
plain paper as the last sheet in the stack.
Do not leave the film in the sheet feeder for long periods of time.
Dust and dirt may accumulate on the film resulting in spotty
printing.
To avoid smudging caused by fingerprints, use a pair of thin cloth
gloves while loading and handling the film.
To avoid fading, do not expose the printed film to prolonged
sunlight.
Store unused papers and films flat. Do not remove papers from their
protective packaging until you are ready to use them.
Store unused film at temperatures between 59°F to 86°F (15°C to
30°C). The relative humidity should be between 10% and 70%.
Uncurling Back Print Film
If Back Print Film becomes curled, follow these steps to uncurl it:
Cover the
nonglossy side
of the film
with a sheet
of plain paper.
Roll the film
and paper up in
the direction
opposite the curl.
Chapter 2
Do not roll the film too tight.
The film and paper rolled together should be about one
inch (2.5 cm) in diameter.
Printing With the MultiPASS C3500 2-29