Datasheet

HP5 Plus
DEVELOPMENT TIMES
If HP5 Plus has been inadvertently exposed at
settings below EI 250/25, the following guide will
ensure usable negatives are obtained. Obviously,
the quality of negatives processed in this way will
not be so high as conventionally processed ones.
Manual processing (min/20°C/68
o
F) –
accidental exposure only
ILFORD Dilution Meter setting
Temperature (
o
F)
developer
EI EI EI
50/18 100/21 200/24
PERCEPTOL
stock 9 9 11
Note Development times may need adjusting to
suit individual processing systems and working
practices. If an established system is producing
good results, adjust the recommended
development times until the desired contrast level is
obtained. Development times in other
manufacturers’ developers are included for your
convenience, and are only a general guide. Other
manufacturers can and do change their product
specifications from time to time, and the
development times may change as a result.
New development time (min)
CHARACTERISTIC CURVES
2
.
0
TEMPERATURES
HP5 Plus film can be processed over a range of
temperatures. Development times at temperatures
Page 5 o
f
7
Temperature (
o
C)
Density
other than 20°C/68
o
F may be calculated from the
chart below.
For example, if 4 minutes at 20°C/68
o
F is
recommended, the time at 23°C/73
o
F will be 3
1
2 3
4
Relative log exposure
1
.
0
minutes and the time at 16°C/61
o
F will be 6
minutes.
HP5 Plus 35mm film developed in ILFORD ILFOTEC
HC (1+31) for 6
1/
2 minutes at 20°C/68
o
F with
intermittent agitation. This curve is also
representative of the rollfilm and sheet film formats.
New development time (min)