Development time

Shanghai General Film Shanghai GP3 400 in D-76

10:00 at 20°C, stock dilution, box speed.

Start timer · 10:00

Time

10:00

Standard

Dilution

Stock

Temperature

20°C

Box speed

ISO 400

B&W

Development time

Dilution	EI	Time	Temp	Agitation	Timer
Stock	400	10:00Not yet verified	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
12:30	11:12	10:00	9:00	8:00	7:12	6:30

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

How they work together

D-76: Fine grain, moderate acutance, full film speed, normal contrast. Long density scale with excellent shadow detail.
Shanghai General Film Shanghai GP3 400: Chinese-manufactured budget 400-speed film from Shanghai General Film. Medium grain with high contrast rendering.
Notes on this pairing: Community-sourced. Multiple reports converge on ~10 min.

Shanghai GP3 400 in other developers

HC-110