Development time

Foma Bohemia Fomapan 400 Action in Fomadon Excel

7:00 at 20°C (68°F), stock dilution, box speed.

Time: 7:00
Dilution: Stock
Temperature: 20°C
Box speed: ISO 400

All 2 times

Dilution	EI	Time	Temp	Agitation	Evidence	Timer
Stock	400	7:00	20°C / 68°F	Standard	ManufacturerChecked Oct 2026	Start timer
Stock	400	2:00	30°C / 86°F	Standard	ManufacturerChecked Oct 2026	Start timer

EI is the speed the film was rated at when shooting. Evidence says where each time comes from: the manufacturer’s own data, a named test, a compilation or several agreeing reports (community consensus), or one person’s report. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet. Where sources give different times, every one is listed and marked “sources differ”.

Other temperatures

18°C64°F	19°C66°F	20°C68°F	21°C70°F	22°C72°F	23°C73°F	24°C75°F
8:45	7:50	7:00	6:18	5:36	5:02	4:33

Calculated from the 20°C (68°F) time using Ilford’s temperature compensation factors, not taken from a datasheet. Most B&W developers behave well between 18–24°C (64–75°F).

Mixing

Dilution	300 ml (10.1 fl oz) (one 35mm roll)	500 ml (16.9 fl oz) (one 120 roll)
Stock	Use as mixed, undiluted	Use as mixed, undiluted

How they work together

Foma Bohemia Fomapan 400 Action: Traditional cubic-grain 400 film (Foma datasheet: RMS 17.5, 90 lines/mm). Rated ISO 400/27; the maker says it gives good results from EI 200 to EI 1600 without changing development.
Notes on this pairing: Fomadon Excel.
Fomadon Excel. Datasheet alternative at 30 °C.

Fomapan 400 Action in other developers

All 12 developers for Fomapan 400 Action

All 2 times

Other temperatures

Mixing

How they work together

Fomapan 400 Action in other developers

Other films in Fomadon Excel