Kodak Module 9 Kodak Formula, Time Replenisher Recirculation R Process Steps, Filtration F

Table 9-3 Mechanical Specifications for Process ECP-2E with PERSULFATE 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

Accelerator ‡‡

,**

AB-1b

AB-1bR

27 ±

1

80

±

2

:20

200 mL

R & F

@40 to 60 L/min

Persulfate Bleach ‡‡ ,**

SR-30

SR-30R

27 ±

1

80

±

2

:40

200 mL

R & F§

@ 40 to 60 L/min

Wash

—

—

27

±

3

80

±

5

:40

1.2 L§§

None

Fixer

F-35b

F-35bR

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

Type

Temperature

RH

Air Flow

Time

Dryer

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°C)

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 the 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 accelerator tank to eliminate odors. Install an exhaust over the persulfate bleach tanks to eliminate corrosion from chlorine vapors. The exhaust system should produce an

air flow of 175 ft3/min (5 m3/min) for every square foot (0.09m2) of solution surface, and provide 50 to 75 ft/min (15 to 23 m/min) control velocity over the surface of the tank.

†† The stop wash rates given in this table assume the use of two-stage countercurrent washes with squeegees between stages. Sing le stage washes require substantially higher wash rates.

‡‡Reconstitute and reuse persulfate bleach (SR-30) and accelerator (AB-1b), to obtain full economic advantage. See Module 5, Chemical Recovery Procedures, for procedures for reconstituting and regenerating persulfate bleach and accelerator.

§§The wash rate given in this table assumes that the final wash and bleach wash are composed of three countercurrent-wash stages with squeegees between stages.The spray pressure and flow rate depend on machine speed and equipment used.

¶¶Fixer replenisher requirements vary with silver recovery equipment, method, and operating conditions. If provision is made fo r 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.

***Processing the print film does not require a formaldehyde stabilizer, therefore you may use Final Rinse, FR-2. FR-2 contains a wetting agent to promote more efficient squeegeeing of the film strand prior to drying. The Spectrus NX1106 or Proxel GXL reduces biological growth in the tank.

9-10 Process ECP-2E Specifications