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TECHNICAL INFORMATION
ORWO Negative Film N 74 plus
Product description: ORWO Negative Film N 74 plus is a high speed black-and-white
panchromatic camera film for both outdoor and indoor usage. Its wide exposure latitude
makes it especially suitable for use under low light illumination and difficult light conditions.
Applications include documentary films, news coverage, underwater and industrial
cinematography. Use of N 74 plus is also recommended under normal light conditions when
greater depth of field is needed.
The N 74 plus is a marked advance over its predecessor, thanks to improved slippage,
extremely low shedding and excellent antistatic qualities.
Base:
Safety base, triacetate, grey coloured, 135 µm
Structure of layers:
protective gelatine layer
emulsion layer 1
emulsion layer 2
subbing layer
base
antistatic back layer
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Availability of standard assortment:
width
35 mm
35 mm
16 mm
length
305 m
122 m
122 m
perforation
N-4740 (BH 1866)
K-Code
N-4740 (BH 1866)
K-Code
0-2 RB-7605 (1RB 2994) K-Code
further possibilities according to request
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Storage:
Raw Stock:
Exposed film:
Processed film:
F I L M O T E C GmbH
Ortsteil Wolfen
ChemiePark Bitterfeld Wolfen
up to 12 month:
18°C or lower
more than 12 month:
13°C or lower
recommended relative humidity:
50 to 70 %
process as soon as possible
store at ≤ 21°C or lower with 40 to 60 % relative humidity for
normal periods
long term storage: according to the standards ISO 5466, SMPTE RP131
and ANSI IT9.11
Substances such as sulphur dioxide and hydrogen sulphide, formaldehyde vapours,
radioactive radiation, and X-rays have a negative influence on films.
Areal A, Röntgenstraße Geb. 415
06766 Bitterfeld-Wolfen
Tel.: +49 (0) - 3494 - 36 96 80
Warranty:
24 months provided the storage conditions specified above have always
been observed.
Fax: +49 (0) - 3494 - 36 96 82
filmotec@filmotec.de
www.filmotec.de
____________________________________________________________________________________
page 1
TI-N74plus-XII/2010
TECHNICAL INFORMATION
ORWO Negative Film N 74 plus
Exposure index: ISO 400 / 27°
The speed value refers to a developed N 74 plus average gradient of 0.65. The exact exposure
index
depends
on
the
prevailing
shooting
and
processing
conditions.
Special feature of light meters, shooting conditions, planned artistic effects and deliberate
processing changes are to be taken into account in setting the lens aperture.
Rehearsal screen tests are recommended
Processing: According to ORWO instruction 1182 (D96) to a recommended average gradient
of 0,65.
RMS-Granularity: ≤ 16 ( read at a net visual diffuse density of 1,0 above the minimum
density using a 48 µm aperture)
≥ 0,80
Modulation transfer factor m30:
Characteristic curve N 74 plus: Processing ORWO instruction 1182
3,00
2,50
Density
2,00
1,50
1,00
0,50
0,00
0,0
0,3
0,6
0,9
1,2
1,5
1,8
2,1
2,4
2,7
3,0
3,3
3,6
3,9
4,2
log H rel
Relative spectral sensitivity of N 74 plus: Equal-energy spectrum
4 ,0 0
3 ,5 0
LOG (Srel)
3 ,0 0
2 ,5 0
2 ,0 0
1 ,5 0
1 ,0 0
F I L M O T E C GmbH
400
450
500
550
600
650
700
w a v e le n g t h [ n m ]
Ortsteil Wolfen
ChemiePark Bitterfeld Wolfen
Areal A, Röntgenstraße Geb. 415
06766 Bitterfeld-Wolfen
Darkroom lighting: N 74 plus should be processed in total darkness.
Tel.: +49 (0) - 3494 - 36 96 80
Fax: +49 (0) - 3494 - 36 96 82
filmotec@filmotec.de
www.filmotec.de
____________________________________________________________________________________
page 2
TI-N74plus-XII/2010