Kodak 7231TM, 5231TM User Manual

TECHNICAL DATA /

BLACK AND WHITE FILM

EASTMAN PLUS-X

February 1999 • H-1-5231

================H-1-7276

Negative Film 5231

™

DESCRIPTION

The speedand grain characteristics of EASTMAN PLUS-X
Negative Film 5231 (35 mm) and 7231 (16 mm) make it
well-suited for general motion picture production—both
outdoorsandinthestudio.Thesefilm characteristics provide
an excellent balance between the maximum desirable speed
for general production work and a fine-grain negative for
that speed. The speed of this panchromatic film permits the
useofsmallapertures, thus allowing good depth of field. The
film is also widely used for making composite projection
background scenes.

BASE

EASTMAN PLUS-X Negative Film has a gray acetate
safety base.

DARKROOM RECOMMENDATIONS

Handle unprocessed film in total darkness. If necessary,you
can use asafelight for a few seconds only after developingis
50percent complete. Use a safelight equipped with a 15-watt
bulb and a KODAKSafelight Filter No. 3/ dark green. Keep
the safelight at least 4 feet (1.2 metres) from the film.

/ 7231

EXPOSURE INDEX/DIN

(For development to a gamma of 0.65 to 0.70.)

Daylight—80/20
Tungsten (3200 K)—64/19

Use these indexes with incident- or reflected-light exposure
meters and cameras marked for ISO or ASA speeds or
exposure indexes. These indexesapply for meter readingsof
average subjects made from the camera position or for
readings made from a gray card of 18-percent reflectance
held close to and in front of thesubject. For unusually light­or dark-colored subjects, decrease or increase the exposure
indicated by the meter accordingly.

EXPOSURE TABLE FOR TUNGSTEN LIGHT

At 24 frames per second (fps), 170˚ shutter opening:

Lens Aperturef/1.4f/2f/2.8f/4f/5.6f/8f/11

Footcandles
required *

* At 18 fps, use3⁄4 of the footcandles (fc) shown.

FILTER FACTORS

™

40 80 160 320 640 1250 2500

STORAGE

Store unexposed film at 13˚C (55˚F) or lower. Process
exposed film promptly. Store processed film at 21˚C (70˚F)

or lower at arelative humidity of 40to 50 percentfor normal
commercial storage. For more information on long-term
storage, see KODAK Publications No. H-1,KODAKMotion
Picture Film, and No. H-23, The Book of Film Care.

KODAK
WRATTEN
Filter No.

Filter Factor
for Daylight

* For use in bright sunlight to reduce the exposure without modifying color

rendering or depth of field. ThisneutraldensityfilterNo.96withadensity of

0.9 reduces the exposure.

3 8 12 15 21 23a 25 29 96*

1.5 2.0 2.5 3.0 3.5 5.0 8.0 25 8.0

RECIPROCITY

You do not need to make any filter corrections or exposure
adjustments for exposure times from 1/10,000 to 1/10
second. At an exposure time of 1 second, increase exposure
by1⁄2 stop.

©Eastman Kodak Company, 1998

PROCESSING

The following starting-point recommendations are for a
typical continuous-strand processing machine. See KODAK
Publication H-24, Manual for Processing KODAK Motion
Picture Films, Module 1, for more information on solution
formulas for machine processing.

IDENTIFICATION

After processing, the product code numbers 5231 or 7231,
emulsion and roll number identification, KEYKODE
Numbers, and internal product symbol (H) are visible along
the length of the film.

Replenishment

Processing

Step

KODAK
Developer D-96*

Stop Rinse‡
KODAK

Fixing Bath F-5*
Countercurrent

Wash (3 stages)
Dry§

* Agitation in the developer and fixing bath should be by recirculation

through submerged spray jets that impinge on the film strands.

† Develop to recommended control gamma of 0.65 to 0.70 calculated

using Status M densitometry (blue).

‡ Fixer-laden water from wash tank, pH about 6.

§ Drying depends on many factors such as air temperature, humidity,
volume and rate of air flow, flow distribution pattern, final squeegeeing,
etc. In a typical motion-picture film dryingcabinet with air at about35˚C
(95˚F) and 40- to 50-percent relative humidity (RH), satisfactory drying
will require 15 to 20 minutes. Film leaving the drying cabinet whenit has
reached room temperature should be at equilibrium with room air at
approximately 50-percent RH.

Temperature

˚C (˚F)

21 ±0.3
(70 ± 0.5)

21 ± 1

(70 ± 2)

21 ±1

(70 ± 2)

21 ±1

(70 ± 2)

35

(95)

Time

(min:sec)

Approx

5:00†

0:50 12,000 6,000

6:00 850 425

10:00 12,000 6,000

———

Rate

(mL per 100 ft)

35 mm 16 mm

1,250

(D-96R)

625

(D-96R)

IMAGE STRUCTURE

The modulation-transfer curves, the diffuse rms granularity,
and the resolving power data were generated from samples
of 5231 Film exposed with tungsten light and processed as
recommended in KODAK Developer D-96. For more
information on image-structure characteristics,see KODAK
Publication No. H-1, EASTMAN Motion Picture Film.

Diffuse RMS Granularity* 10

Resolving Power†

* Read at a net diffuse visual density of 1.0, using a

48-micrometer aperture.

† Determined according to amethod similar to the one described

in ISO 6328-1982,

Determination of ISO Resolving Power.

TOC 1.6:1
TOC 1000:1

Photography—Photographic Materials—

32 lines/mm

100 lines/mm

2 EASTMAN PLUS-X Negative Film 5231™ / 7231™ • H-1-5231