Ilford 1678361 用户手册
TECHNICAL INFORMATION
ISO 125/22º BLACK AND WHITE PROFESSIONAL FILM
FOR HIGH PRINT QUALITY AND FLEXIBILITY IN USE
EXPOSURE RATING
FP4 Plus has a speed rating of ISO 125/22º
(125ASA, 22DIN, EI 125/22) to daylight. The ISO
speed rating was measured using ILFORD ID-11
developer at 20ºC/68ºF with intermittent agitation
in a spiral tank.
ILFORD FP4 Plus is an exceptionally fine grain,
medium speed, black and white film. It is ideal for
high quality indoor and outdoor photography,
particularly when giant enlargements are to be
made. In addition to general photography, FP4
Plus is also suited to copying and internegative
work, and has many applications in scientific,
technical and industrial photography.
Best results are obtained at EI 125/22, but good
image quality will also be obtained at meter
settings from EI 50/18 to EI 200/24.
FP4 Plus is robust and will give usable results even
if it is overexposed by as much as six stops, or
underexposed by two stops. It is compatible with
all major processing systems, including those
which give the standard short fixing and washing
times.
FP4 Plus 35mm film is coated on 0.125mm/5-mil
acetate base and is available in 24 or 36
It should be noted that the exposure index (EI)
range recommended for FP4 Plus is based on a
practical evaluation of film speed and is not based
on foot speed, as is the ISO standard.
SPECTRAL SENSITIVITY
Wedge spectrogram to tungsten light
(2850K)
exposure cassettes, or in bulk lengths of 17 and
30.5 metres (56 and 100ft). FP4 Plus 35mm film is
supplied in DX coded cassettes, suitable for all
35mm cameras.
FP4 Plus rollfilm is coated on 0.110mm/4-mil clear
acetate base with an anti-halation backing which
clears during development. It is available in 120
and 220 lengths and is edge numbered 1 to 19
(120) and 1 to 40 (220).
FP4 Plus sheet film is coated on 0.180mm/7-mil
polyester base with an anti-halation backing which
clears during development. It is available in a
wide range of standard sizes. The emulsion faces
the user when sheet film is held in the position
shown.
Sensitivity
Wavelength nm
FILTER FACTORS
FP4 Plus film may be used with all types of filters
(eg 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 1
1/2
stops.
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