Development time

Ilford Ilford Delta 100 in Ilfotec DD-X

10:30 at 20°C, 1+4 dilution, box speed.

Start timer · 10:30

Time

10:30

Standard

Dilution

1+4

Temperature

20°C

Box speed

ISO 100

B&W

All 2 times

Dilution	EI	Time	Temp	Agitation	Timer
1+4	100	10:30	20°C / 68°F	Standard	Start timer
1+4	200+1 stop	12:00	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
13:08	11:46	10:30	9:27	8:24	7:34	6:50

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)
1+4	60 ml developer + 240 ml water	100 ml developer + 400 ml water

How they work together

Ilfotec DD-X: Fine grain, high acutance, full film speed, normal contrast. Full emulsion speed with excellent shadow detail.
Ilford Ilford Delta 100: Core-Shell crystal technology for extreme sharpness and virtually invisible grain. Clinical and precise look.
Notes on this pairing: Pushed +1 stop.

Ilford Delta 100 in other developers

ID-11