Tetenal COLORTEC C-41 Mode D'emploi page 6

GENER AL IN ST RU CT IO NS
PROCESSING
Stop bath (TETENAL Indicet 1+19 or 3% acetic acid: 20 s) increases processing

reliability when the bleach fix bath is re-used several times.
If the user processes predominantly high-speed films (ISO 400/27° and faster), it is

recommended that only three development runs (per litre of colour developer) be
done.
If development is uneven (sheet films), it is recommended that the rotation speed be

increased and/or the film be pre-washed for two minutes at process temperature.
It is important to set the drying temperature so that the film emerges flat from the

drying cabinet. If the emulsion side is buckled, then the drying temperature is too
high. If the reverse side is buckled, then the temperature is too low. The drying tem-
perature needs to be adjusted to take account of prevailing conditions, with due
regard to relative humidity (seasonal variations).
The times given in the tables include times of approx. 10 sec for pouring out the bath

concerned. The times given for bleach fixing and final rinsing are minimum times and
may be exceeded by up to 50%.
DEVIATIONS IN RESULTS
Results
Insufficient colour density
Insufficient colour
density and insufficient
contrast, minimum
density (mask) too bright
Colour of mask brownish
Milky streaks and
surfaces after drying
White spots on dry film
Colour of mask untypical,
minimum density too high
but maximum density too low
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Possible causes
Under-exposure of film
Under-development
Development time too short
and/or temperature too low
Bleach-fixing time too short
Insufficient bleaching,
in sufficient moistening
of film
Calcium spots, application
water too hard
Colour developer contamina-
ted by bleach-fixer
Measure
Check camera
Increase colour develop ment time
(by 15-30 s). Keep to processing
conditions
Bleach-fix film again and rinse
Follow-up treatment in bleach-fixer
necessary
Apply stabiliser in future using
1/3 tap water + 2/3 demineralised
(boiled) water. Bath films again in
this solution
Fresh application of colour deve-
loper