Development time

Foma Bohemia Fomapan 100 Classic in 510-Pyro

10:30 at 20°C, 1+100 dilution, EI 80 (−⅓ stop).

Start timer · 10:30

Time

10:30

Stand

Dilution

1+100

Temperature

20°C

Box speed

ISO 100

B&W

All 2 times

Dilution	EI	Time	Temp	Agitation	Timer
1+100	80−⅓ stop	10:30	20°C / 68°F	Stand	Start timer
1+100	50−1 stop	7:15	21°C / 70°F	Continuous	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+100	3 ml developer + 297 ml water	5 ml developer + 495 ml water

How they work together

510-Pyro: Very-high acutance, full film speed, compensating contrast. Exceptional highlight control with subtle staining.
Foma Bohemia Fomapan 100 Classic: Traditional cubic-grain emulsion with good sharpness. Budget-friendly with heightened red sensitivity. Best at EI 50-80.
Notes on this pairing: Hartung semi-stand: 1 min continuous inversion, then one inversion at 10, 20, 30 min.
Rotary processor or tray, continuous agitation. Presoak.

Fomapan 100 Classic in other developers

D-76