TM 5-3610-257-14
(3)
Reset HIGHLIGHT UNITS to read 180 (18 seconds).
(4)
Standard for all line exposures is now 18 seconds when using same film, chemistry and other materials.
f.
Using filter factors. The following table, when used, will greatly reduce the time required to compute an exposure
to compensate for filter factor.
Table 3-4. FILTER FACTOR RATIO TO DENSITY
FILTER FACTOR
ADD DENSITY
NOTE
•
To use filter factor table, set density value found opposite filter factor, on density dials of exposure
control instrument.
•
The instrument automatically increases exposure to compensate for added filter factor. This
increase is added to copy density.
1
.00
1.5
.18
2
.30
2.5
.40
3
.48
3.5
.54
4
.60
4.5
.65
5
.70
5.5
.74
6
.78
6.5
.81
7
.85
7.5
.88
8
.90
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