Kodak D-32 User Manual

5

D-32

Development/transport time and transport rates are set 
to achieve desired photographic aims; replenishment 
rate settings are determined by multiplying the 
transport speed by the required replenishment rates for 
the appropriate film width being used.

Use the chart and formula provided to determine the 
developer and fixer replenishment rates (mL/min) by 
multiplying transport speed (ft/min) (which is 
determined by dividing the path length of the developer 
tank in feet by the dwell time in seconds and 
multiplying by 60; see example) and the appropriate 
processor replenishment specification (mL/linear ft).

NOTE: These are starting point recommendations. 

Actual settings may require adjustments to 
maintain process activity levels. Shorter dwell 
times are acceptable; however, exposure 
adjustments will be necessary.

For Processor:

Allen M-70 Processor

Type of FIlm:

35 mm (2468 Microfilm)

Dwell:

70 seconds

Developer Film Path:

84 feet

Replenishment (Dev):

2 (from table above)

Calculated transport speed:

84 feet  x 60 sec/min = 72 feet/min

70 sec                       (transport speed)

Results:

72 feet/min x 2 mL/ft = 144 mL/min

replenishment rate for developer

Total safelight exposure, whether before or after image 

exposure, should not exceed 30 minutes. For 
darkroom handling, x468 and 2470 Microfilms should 
use a Kodak 1 Safelight Filter / red or Kodak 2 
Safelight Filter / dark red, in a suitable safelight lamp 
with a 15-watt bulb, located at least 4 feet (1.2 meters) 
from the film. x462 Microfilms should use a Kodak OA 
Safelight Filter /greenish yellow, with the same lamp 
distance conditions. When using gooseneck lamps 
with contact printers, a Kodak 1 Safelight Filter / red is 
required.

For optimum life of Direct Duplicating Microfilms (x468 

and 2470), keep unopened packages at 55°F (13°C), 
at 50 percent relative humidity or below, and protected 
from radiation and x-rays. Film stored at higher 
temperatures or humidities for a period of six months 
or more may lose photographic speed or D-max. 
Duplicating Microfilm (x462) can be stored at 70°F 
(21°C) at 50 percent relative humidity or below, and 
protected from radiation and x-rays. To avoid moisture 
condensation on film that has been refrigerated, allow 
cold film to reach approximate room temperature 
before opening the package (about 3 hours if 
refrigerated, 5 hours if frozen).

These microfilms are manufactured to ANSI and ISO 

specifications for extended term storage use. When 
processed as recommended, these microfilms meet 
both ANSI and ISO specifications for microfilms 
intended for long-term storage. These microfilms have 
a Life Expectancy LE-500 rating.

Gelatin Type Black-and-White Film — Specifications 
for Stability, state that the maximum permissible 
concentration of thiosulfate ion is 0.014 grams per 
square meter (1.4 micrograms per square centimeter). 
Thiosulfate limits for Class 1 grain apply to this 
microfilm.

0.75

0.75

1.5

1.5

N/A

N/A

Deep 
Tank

1.00

1.25

2.0

2.5

6.0

7.5