Replenishment rates – Kodak D-32 User Manual

Page 7

September 2009 D-32

Replenishment rates

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.

A calculation of replenisher rate follows:

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 ft x 60 sec/min = 72 ft/min

70 sec (transport speed)

Results:

72 ft/min x 2 mL/ft = 144 mL/min

replenishment rate for developer

Replenishment mL/linear ft

16 mm

35 mm

105 mm

Dev

Fix

Dev

Fix

Dev

Fix

Kodak Prostar

0.75

1.5

N/A

Deep Tank

1.00

1.25

2.0

2.5

6.0

7.5

Transport
speed X
(ft/min)

Replenishment/
feet of film =
(mL/Lft)

Replenishment
rate
(mL/min)