Development time

Kodak T-Max 400 in XTOL

6:30 at 20°C, stock dilution, box speed.

Start timer · 6:30

Time

6:30

Standard

Dilution

Stock

Temperature

20°C

Box speed

ISO 400

B&W

All 4 times

Dilution	EI	Time	Temp	Agitation	Timer
Stock	400	6:30	20°C / 68°F	Standard	Start timer
1+1	400	8:00Not yet verified	20°C / 68°F	Standard	Start timer
Stock	800+1 stop	8:30	20°C / 68°F	Standard	Start timer
Stock	1600+2 stops	11:00	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
8:08	7:17	6:30	5:51	5:12	4:41	4:14

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

XTOL: Fine grain, high acutance, full film speed, normal contrast. Excellent shadow detail with wide latitude.
Kodak T-Max 400: Known for exceptionally fine grain among 400-speed B&W films. Tabular grain technology offers high sharpness and resolving power.
Notes on this pairing: Per Kodak J-109 datasheet.
Pushed +1 stop.
Pushed +2 stops.

T-Max 400 in other developers

D-76