EASTMAN PLUS-X Negative Film 5231 / 7231

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Contents

• Base
• Darkroom Recommendations
• Storage
• Exposure Index/DIN
• Exposure Table for Tungsten Light
• Filter Factors
• Reciprocity
• Processing
• Identification
• Image Structure
• Curves
• Printable Curves
• Available Roll Lengths

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 a safelight for a few seconds only after developing is 50% complete. Use a safelight equipped with a 15-watt bulb and a KODAK Safelight Filter No. 3 (dark green). Keep the safelight at least 4 feet (1.2 meters) from the film.

Storage

Store unexposed film at 13C (55F) or below. Process exposed film promptly. Store processed film at 21C (70F) or lower at a relative humidity of 40 to 50 percent for normal commercial storage. For more information on long-term storage conditions, see KODAK Publications No. H-1, EASTMAN Professional Motion Picture Films, and No. H-23, The Book of Film Care.

Exposure Index/DIN

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

Daylight-80/20

Tungsten (3200 K)-64/19

Use these exposure indexes with incident- or reflected-light exposure meters and cameras marked for ISO or ASA speeds or exposure indexes.

These indexes apply for meter readings of 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 the subject. For unusually light- or 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:

*At 18 fps, use 3/4 of the foot-candles (fc) shown.

Filter Factors

*For use in bright sunlight to reduce the exposure without modifying color rendering or depth of field. This neutral density filter No. 96 with a density of 0.9 reduces the exposure by 3 stops.

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 by 1/2 stop.

Processing

The following starting-point recommendations are for a typical continuous-strand processing machine. See KODAK Publication H-24.01, Manual for Processing EASTMAN Motion Picture Films, Module 1, for more information on solution formulas for machine processing.

*Agitation in the developer and fixing baths should be recirculated 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 drying cabinet with air at about 95 F (35 C) and 40- to 50-percent relative humidity (RH), satisfactory drying will require 15 to 20 minutes. Film leaving the drying cabinet when it has reached room temperature should be at equilibrium with room air at approximately 50-percent RH.

Identification

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

Image Structure

The modulation-transfer curves, the diffuse rms granularity, and resolving power data were generated from samples of 5231 Film exposed to 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 Professional Motion Picture Films.

Diffuse RMS Granularity* 10

*Read at a net diffuse visual density of 1.0, using a 48-micrometer aperture.

§Determined according to a method similar to the one described in ISO 6328-1982, Photography-Photographic Materials-Determination of ISO Resolving Power.

Curves

Characteristic

Spectral Sensitivity

MTF

Diffuse rms Granularity

Printable Curves

Available Roll Lengths

For information on film roll lengths, check Kodak's Professional Motion Imaging Price Catalog. or see a Kodak sales representative in your country.

The Kodak materials described in this publication for use with EASTMAN PLUS-X Negative Film 5231 and 7231 are available from dealers who supply Kodak products. You can use other materials, but you may not obtain similar results.

©Eastman Kodak Company 1998