Development time

Harman Technology Kentmere Pan 100 in Perceptol

12:30 at 20°C, stock dilution, box speed.

Start timer · 12:30

Time

12:30

Standard

Dilution

Stock

Temperature

20°C

Box speed

ISO 100

B&W

Development time

Dilution	EI	Time	Temp	Agitation	Timer
Stock	100	12:30	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
15:38	14:00	12:30	11:15	10:00	9:00	8:08

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

Perceptol: Moderate acutance, normal contrast. Extremely fine grain, optimised for enlargement.
Harman Technology Kentmere Pan 100: Harman's budget fine-grain film. Clean, smooth tones ideal for beginners and scanning. Less resolving power than Delta 100 but excellent value.

Kentmere Pan 100 in other developers

D-76