Development time

Kodak Tri-X 400 in D-76

6:45 at 20°C, stock dilution, box speed.

Start timer · 6:45

Time

6:45

Standard

Dilution

Stock

Temperature

20°C

Box speed

ISO 400

B&W

All 7 times

Dilution	EI	Time	Temp	Agitation	Timer
Stock	400	6:45	20°C / 68°F	Standard	Start timer
1+1	400	9:45	20°C / 68°F	Standard	Start timer
Stock	1600+2 stops	9:30	20°C / 68°F	Standard	Start timer
Stock	800+1 stop	8:00	20°C / 68°F	Standard	Start timer
1+1	800+1 stop	11:00	20°C / 68°F	Standard	Start timer
1+1	1600+2 stops	14:00	20°C / 68°F	Standard	Start timer
Stock	200−1 stop	5:00	20°C / 68°F	Standard	Start timer

EI is the speed the film was rated at when shooting. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet.

Other temperatures

18°C	19°C	20°C	21°C	22°C	23°C	24°C
8:26	7:34	6:45	6:05	5:24	4:52	4:23

Calculated from the 20°C time using Ilford’s temperature compensation factors, not taken from a datasheet. Most B&W developers behave well between 18°C and 24°C.

Mixing

Dilution	300 ml (one 35mm roll)	500 ml (one 120 roll)
Stock	Use as mixed, undiluted	Use as mixed, undiluted
1+1	150 ml developer + 150 ml water	250 ml developer + 250 ml water

How they work together

D-76: Fine grain, moderate acutance, full film speed, normal contrast. Long density scale with excellent shadow detail.
Kodak Tri-X 400: A classic photojournalism film with a long heritage. Known for its distinctive gritty grain, high contrast, and strong push-processing capability.
Notes on this pairing: Classic combination for fine grain and full emulsion speed.
One-shot use for higher sharpness.
Pushed +2 stops. CORRECTED from 795s per F-4017 datasheet.
Pushed +1 stop.
Pushed +2 stops.
Pulled -1 stop. Reduced contrast, finer grain.

Tri-X 400 in other developers

Df96 Monobath