Kodak D-32 User Manual

3

D-32

The following “duplication tree” illustrates how the 
various duplicating microfilms are used to produce the 
desired contrast and image polarity of distribution 
copies. As an example, 3N is showing 3rd generation 
negative-appearing distribution copies.

CN = Camera Negative
LC = Low Contrast
MC = Medium Contrast
HC = High Contrast

1 = 1

st

 generation

2 = 2

nd

 generation

3 = 3

rd

 generation

N = Negative polarity
P = Positive polarity
D = Distribution

* Static-resistant—process-survivable
**Unprocessed

The following table indicates value for 1/25-second 
tungsten exposures calculated using the formula 45/H, 
where H is the exposure in lux-seconds required for a 
density of .10 (1.20 for x462 Microfilm) above minimum 
density with indicated processing. This number can be 
used directly with incident-light meters.

*Recommended processes

(mils Estar)

2462, 2468, 
2470

4.0

4.2

3468

2.5

2.7

4462, 4468

7.0

7.2

x462

2.1

x468

0.2

2470

0.12