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It may be difficult to use the table to estimate the
adjusted times for calculated exposure times between 1
and 100 seconds. The graphs that follow will help you find
the adjusted times for calculated exposure times between
those given in the table.
50
40
30
20
10
1
2
3
4
5
6
7
8
9
10
CALCULATED EXPOSURE
TIME (Seconds)
10
20
30
40
50
CALCULATED EXPOSURE TIME (Seconds)
KODAK PROFESSIONAL TRI-X 320 and 400 Films • F-4017
20
1,200
19
1,100
18
17
1,000
16
15
900
14
800
13
12
700
11
10
600
9
500
8
7
400
6
5
300
4
200
3
2
100
1
60
70
80
90
100
F002_0062GC
Filter Corrections
Multiply the normal exposure time by the filter factor.
KODAK PROFESSIONAL TRI-X 400 Film / 400TX
KODAK WRATTEN
Gelatin Filter
No. 8 (yellow)
No. 11 (yellowish green)
No. 12 (deep yellow)
No. 15 (deep yellow)
*
No. 25 (red)
No. 47 (blue)
*
No. 58 (green)
*
Polarizing Filter
*
Filter recommended for making separation negatives.
KODAK PROFESSIONAL TRI-X 320 Film / 320TXP
KODAK WRATTEN
Gelatin Filter
No. 8 (yellow)
No. 11 (yellowish green)
No. 15 (deep yellow)
*
No. 25 (red)
*†
No. 29 (red)
No. 47 (blue)
*
No. 58 (green)
*
Polarizing Filter
*
Filter recommended for making separation negatives.
†
For TRI-X 320 sheet film only.
DARKROOM RECOMMENDATIONS
Handle unprocessed film in total darkness.
Using a safelight will affect your results. If absolutely
necessary, after development is half complete, you can use
a safelight equipped with a KODAK 3 Safelight Filter (dark
green) with a 15-watt bulb for a few seconds. Keep the
safelight at least 4 feet (1.2 metres) from the film. Run tests
to determine that safelight use gives acceptable results for
your application.
For information on safelight testing, see KODAK
Publication No. K-4, How Safe Is Your Safelight?
Daylight Filter
Tungsten Filter
Factor
Factor
2
1.5
4
3
2.5
—
2.5
1.5
8
5
6
12
6
6
2.5
2.5
Daylight Filter
Tungsten Filter
Factor
Factor
2
1.5
4
4
2.5
2
8
5
16
10
6
10
8
8
2.5
2.5
3
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