Kodak D-32 - Manual (Page 6)

D-32 September 2009 5
Exposure guidelines — 2468/3468 and 2470
Print density decreases with increased exposure and increases with added
development for the direct duplicating microfilms. For intermediate duplicating
masters, generally the D-min in the master should be printed to the density in
the following table. 2470 Microfilm is generally not used for distribution copies.
If it is used as a distribution copy, reduce D-min levels to the levels indicated
for 2468/3468 Microfilm.
Processing
information Processors and processing chemicals
Kodak Duplicating Microfilms can be processed in most typical continuous-
strand type medium- and deep-tank processors using common Kodak
Processing Chemicals and parameters. They are compatible with all standard
microfilm processing equipment and high quality microfilm chemicals, although
results may vary.
IMPORTANT: For best results and to avoid aeration, always add chemical
concentrate to water, not water to concentrate.
Processor set up
Following are the specifications for all Kodak Duplicating Microfilms. These are
the starting points and mixed formats.
NOTE: The dwell times and temperatures are starting points only. Specific
systems or customer needs may demand variation from these values
based on photographic aims. Dwell time is determined by timing film
speed from entrance roller to exit roller while running in the processor.
Deep tank times given should match the photographic results of a
Prostar Processor; significantly shorter development times are
achievable with these films by using higher exposure conditions
without any detriment to image quality.
* For 2462 Microfilm, the starting dwell time for the developer is 68 seconds.
Microfilm Exposure Control
Print D-min of master to a density on
the duplicate as specified below:
2462 .08 to .15
2468/3468 .10 to .15
2470 .15 to .25
Conventional
Processor Developer Fixer Wash Dry Dilution
Dwell Temp Dwell Temp Temp Temp Dev Fix
Kodak Prostar 13.5 sec. 100°F
37.8°C
13.5
sec.
96°F
35.6°C
96°F
35.6°C
135°F
57.2°C
Ready to Use
Deep tank 90 sec.* 8°F
29.4°C
45-90
sec.
85°F
29.4°C
80°F
26.7°C
160°F Max
71.1°C
1:7 1:3