Table 9-4 Mechanical Specifications for Process ECP-2E with FERRICYANIDE Bleach

 

KODAK Formula

 

Temperature*

 

Time

Replenisher

Recirculation (R);

Process Steps

 

 

 

 

 

 

 

 

 

(Wash Rate) per

 

 

 

 

 

 

 

 

 

Filtration (F);

Tank

 

Replenisher

 

°C

 

°F

 

min:sec

100 ft. (30.5 m)

 

 

 

 

 

Turbulation (T)

 

 

 

 

 

 

of 35 mm Film†

 

 

 

 

 

 

 

 

 

 

 

 

Developer‡

SD-50

 

SD-50Ra

36.7 ±

0.1

98.0

±

0.2

3:00

690 mL

R, F§, & T

 

 

 

 

 

 

 

 

 

 

 

 

@ 125 to 175 L/min

 

 

 

 

 

 

 

 

 

 

 

 

Stop**

SB-14

 

SB-14

27 ±

1

80

±

2

:40

770 mL

R & F

 

 

 

 

 

 

 

 

 

 

 

 

@ 40 to 60 L/min

 

 

 

 

 

 

 

 

 

 

 

 

 

Wash††

—

 

—

27

±

3

80

±

5

:40

1.2 L††

None

Ferricyanide Bleach‡‡

SR-27

 

SR-27R

27 ±

1

80

±

2

1:00

200 mL

R & F§

 

 

 

 

 

 

 

 

 

 

 

 

@ 40 to 60 L/min

 

 

 

 

 

 

 

 

 

 

 

 

 

Wash††

—

 

—

27

±

3

80

±

5

:40

1.2 L††

None

Fixer

F-35d

 

F-35dR

27 ±

1

80

±

2

:40

§§

R & F

 

 

 

 

 

 

 

 

 

 

 

 

@ 40 to 60 L/min

 

 

 

 

 

 

 

 

 

 

 

 

 

Wash††

—

 

—

27

±

3

80

±

5

1:00

1.2 L†† , ¶¶

None

Final Rinse***

FR-2

 

FR-2R

27 ±

3

80

±

5

:10

400 mL

R & F

 

 

 

 

 

 

 

 

 

 

 

 

@ 40 to 60 L/min

 

 

 

 

 

 

 

 

 

 

 

Dryer

 

Type

 

Temperature

 

RH

Air Flow

Time

 

 

 

 

 

 

 

 

 

Impingement

 

57°C (135°F)

 

15% to 25%

5000ft3/min

3 to 5 min.

 

 

 

 

 

 

 

 

 

 

 

Nonimpingement

 

43° to 49°C

 

15% to 25%

5000ft3/min

5 to 7 min.

 

 

(110° to 120°F)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lubrication

 

35 mm

 

 

Edgewax

 

 

 

 

 

 

16 x 18 mm

Full-coat lubrication

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* Celsius temperatures are rounded consistent with process-control requirements. Fahrenheit temperatures are primary.

†For 16 mm film, use one-half the 35 mm film replenishment and wash rates. Since processing operations can vary greatly in resp ect to such factors as film-to-leader ratio, squeegee efficiency, and amount of film processed per unit of time, adjustments in replenisher rates and/or formulas may be required

to maintain the recommended tank concentrations. With efficient squeegees, adjustment rates for 35 mm leader will be as low as 20 mL/100 ft.

‡Maintain close control of developer time and temperature, since small deviations can lead to severe contrast mismatch. Use an accurate thermometer for checking the temperature controller variability. The temperature should be uniform throughout the developer tank.

§Use polypropylene, fiberglass, or bleached cotton as a filter medium in the developer. Viscose rayon is not recommended for prebath, developer, or bleaches because of undesirable photographic effects.

¶ Design developer racks with submerged rollers and rack-drive assemblies to minimize solution aeration and splashing.

**Install an exhaust over the stop tank, since developer carried over into the stop generates sulfur dioxide. Install an exhaust over the bleach tanks to eliminate corrosion from vapors. The exhaust system should produce an air flow of 175 ft3/min (5 m3/min) for every square foot (0.09 m2) of solution surface and provide 50 to 75 ft/min (15 to 23 m/min) control velocity over the surface of the tank.

††The wash preceding the ferricyanide bleach must not become acid enough to lower the bleach pH below 6.0. Low pH in a ferricya nide bleach can promote the formation of Prussian blue. Keep the wash after the bleach effective enough to prevent film mottle from the reaction products of bleach carry-over into the fixer. Two-stage countercurrent washes with squeegees between stages is recommended for stop wash. The final wash and bleach wash rates assume the use of three-stage countercurrent washes with squeegees between stages. The wash rates given in the table assume the use of such staged washes. Single-stage washes require substantially greater wash rates.

‡‡Reconstitute and reuse the bleach to obtain the full economic advantage. See Module 5, Chemical Recovery Procedures, for a procedure for regenerating Ferricyanide Bleach.

§§Fixer replenisher requirements vary with silver recovery equipment, method, and operations conditions. If provision is made for continuous electrolytic desilvering for the recirculated fixer, the silver concentration should be maintained between 0.5 and 1 g/L. See Module 5, Chemical Recovery Procedures, for details. The fixer and replenisher must be kept separate from other processes. Savings from reconstituting desilvered fixer overflow for use as replenisher are possible.

¶¶ The wash rate given in this table assumes that the final wash is composed of three countercurrent-wash stages with squeegees between stages.

***The final rinse contains a wetting agent to promote more efficient squeegeeing of the film strand prior to drying. The Proxel GXL or Spectrus NX1106 controls biological growth in the tank.

Process ECP-2E Specifications

9-11

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Kodak Module 9 specifications Fixer 35d 35dR 27 ± @ 40 to 60 L/min Wash†† 100
Page 12 Page 14

Module 9 specifications

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