Technical Data Sheet

Page 2 of 6
Nov 2018
FP4 PLUS Technical Information
FILTER FACTORS
FP4 Plus film may be used with all types of filters (e.g. colour, polarising and neutral density filters) in the usual
way. Follow the instructions given by the filter manufacturer.
The exposure increase in daylight may vary with the angle of the sun and the time of day. In the late afternoon
or the winter months, when daylight contains more red light, green and blue filters may need slightly more
exposure than usual.
Cameras with through-the-lens metering will usually adjust the exposure automatically when using filters. With
some automatic exposure cameras, the correction given for deep red and orange filters can produce negatives
under exposed by as much as 1½ stops.
MAKING LONG EXPOSURES
For exposures between ½ and 1/10 000 second, no
adjustments are needed for reciprocity law failure.
When exposures longer than ½ second are given, FP4
Plus, along with other films, needs to be given more
exposure than indicated by a meter. Use the graph to
calculate the increased exposure time which should be
given once the metered time is known.
The graph is based on the formulae Ta = Tm
1.26
Ta = Adjusted Time
Tm = Metered Time
CHOOSING THE BEST ILFORD DEVELOPER FOR THE JOB
Manual processing Spiral tank, dish/tray, deep tank Including rotary processors
Liquid
Powder
Best overall image quality
ILFOTEC DD-X
ID-11 (stock)
Finest grain
ILFOTEC DD-X
PERCEPTOL (stock)
Maximum sharpness
ILFOSOL 3 (1+9)
ID-11 (1+3)
Maximum film speed
ILFOTEC DD-X
MICROPHEN (stock)
Economy
ILFOTEC LC29 (1+29)
ID-11 (1+3)
MICROPHEN (1+3)
One-shot convenience
ILFOSOL 3 (1+9)
ILFOTEC DD-X
ID-11 (1+1)
MICROPHEN (1+1)
Replenishable
ILFOTEC DD-X
ID-11
Machine Processing
Dip and dunk
ILFOTEC DD
Best overall image quality (liquid) and long tank life
Short leader
ILFOTEC RT RAPID
Rapid processing, best overall image quality and
long tank life.
Roller transport
ILFOTEC RT RAPID
Rapid processing