Kodak 7231TM, 5231TM manual Processing, Identification, Image Structure

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.

			Replenishment
Processing	Temperature	Time	Rate
			(mL per 100 ft)
Step	˚C (˚F)	(min:sec)
			35 mm	16 mm
KODAK	21 ± 0.3	Approx	1,250	625
Developer D-96*	(70 ± 0.5)	5:00†	(D-96R)	(D-96R)
Stop Rinse‡	21 ± 1	0:50	12,000	6,000
	(70 ± 2)
KODAK	21 ± 1	6:00	850	425
Fixing Bath F-5*	(70 ± 2)
Countercurrent	21 ± 1	10:00	12,000	6,000
Wash (3 stages)	(70 ± 2)
Dry§	35	—	—	—
	(95)

*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 drying cabinet with air at about 35˚C (95˚F) 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, 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 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†	TOC 1.6:1	32 lines/mm
	TOC 1000:1	100 lines/mm

*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.

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