Development Timing System Chart

DIRECTIONS FOR USE: Locate recommended developing Temperature/Time combination. Note chart letter and use any convenient temperature/time combination on that letter’s line for matching results. Chart is based on developing activity, which doubles per each increase of 6.66°C (12°F). Most films should remain below 25°C.

 

Development Timing System Chart
CHART LETTER TEMP ⁄ TIME (min:sec)
18.0°C
(64.5°F)
19.0°C
(66.0°F)
20.0°C
(68.0°F)
21.0°C
(70.0°F)
22°C
(71.5°F)
23°C
(73.5°F)
24°C
(75°F)
25°C
(77°F)
26°C
(79°F)
27°C
(80.5°F)
28°C
(82.5°)F
29°C
(84°F)
30°C
(86°F)
CHART LETTER 18°C

(64.5°F)

19°C

(66°F)

20°C

(68°F)

21°C

(70°F)

22°C

(71.5°F)

23°C

(73.5°F)

24°C

(75°F)

25°C

(77°F)

26°C

(79°F)

27°C

(80.5°F)

28°C

(82.5°F)

29°C

(84°F)

30°C

(86°F)

TEMP ⁄ TIME (min:sec)
AAA 1:14 1:07 1:00 0:54 0:49 0:44 0:40 0:36 0:32 0:29 0:26 0:23 0:21
AA 1:26 1:18 1:10 1:03 0:57 0:51 0:46 0:42 0:38 0:34 0:31 0:28 0:25
A 1:44 1:34 1:25 1:17 1:09 1:02 0:57 0:51 0:46 0:41 0:37 0:34 0:30
B 1:57 1:45 1:35 1:26 1:17 1:10 1:03 0:57 0:51 0:46 0:41 0:37 0:34
C 2:15 2:00 1:50 1:39 1:29 1:21 1:13 1:05 0:59 0:53 0:48 0:43 0:39
D 2:35 2:20 2:05 1:53 1:42 1:32 1:23 1:14 1:07 1:00 0:55 0:49 0:44
E 3:00 2:40 2:25 2:10 1:58 1:46 1:36 1:26 1:18 1:10 1:03 0:57 0:51
F 3:29 3:08 2:50 2:33 2:18 2:05 1:52 1:40 1:31 1:22 1:14 1:07 1:00
G 4:00 3:37 3:15 2:56 2:38 2:23 2:09 1:55 1:44 1:34 1:25 1:17 1:09
H 4:45 4:15 3:45 3:23 3:03 2:45 2:29 2:15 2:01 1:45 1:38 1:28 1:20
I 5:15 4:45 4:15 3:50 3:27 3:05 2:48 2:30 2:17 2:03 1:51 1:40 1:30
J 6:15 5:30 5:00 4:30 4:00 3:40 3:18 2:58 2:41 2:25 2:11 1:57 1:46
K 7:00 6:15 5:45 5:15 4:45 4:15 3:48 3:25 3:05 2:47 2:30 2:16 2:02
L 8:00 7:15 6:30 5:45 5:15 4:45 4:15 3:52 3:29 3:08 2:50 2:33 2:18
M 9:15 8:15 7:30 6:45 6:00 5:30 5:00 4:30 4:00 3:37 3:16 2:56 2:39
N 10:30 9:30 8:30 7:45 7:00 6:15 5:30 5:00 4:30 4:00 3:38 3:16 2:57
O 12:30 11:00 10:00 9:00 8:00 7:15 6:30 6:00 5:30 4:45 4:15 3:56 3:32
P 14:00 13:00 11:30 10:15 9:15 8:30 7:30 6:45 6:00 5:30 5:00 4:30 4:00
Q 16:00 14:30 13:00 11:45 10:30 9:30 8:30 7:45 7:00 6:15 5:30 5:00 4:30
R 18:30 17:00 15:00 13:30 12:30 11:00 10:00 9:00 8:00 7:15 6:30 5:45 5:15
S 21:00 19:00 17:00 15:00 14:00 12:30 11:15 10:00 9:00 8:00 7:15 6:45 6:00
T 25:00 22:00 20:00 18:00 16:00 14:30 13:00 12:00 11:00 10:00 9:00 8:00 7:00
U 28:00 25:00 23:00 20:30 18:30 17:00 15:00 13:30 12:30 11:00 10:00 9:00 8:00
V 31:00 28:00 25:00 22:30 20:30 18:30 16:30 15:00 13:30 12:00 11:00 10:00 9:00
W 37:00 33:00 30:00 27:00 24:00 22:00 20:00 18:00 16:00 14:30 13:00 11:45 10:30
X 43:00 39:00 35:00 32:00 29:00 26:00 23:00 21:00 19:00 17:00 15:00 13:30 12:30
Y 49:00 44:00 40:00 36:00 32:00 29:00 26:00 24:00 21:30 19:30 17:30 15:30 14:00
Z 56:00 50:00 45:00 41:00 37:00 33:00 30:00 27:00 24:00 22:00 20:00 17:30 16:00
ZZ 74:00 67:00 60:00 54:00 49:00 44:00 40:00 36:00 32:00 29:00 26:00 23:30 21:00
ZZZ 86:00 78:00 70:00 63:00 57:00 51:00 46:00 42:00 38:00 34:00 30:00 27:00 25:00

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