rolllog

Development times

Ilford FP4 Plus in Ilford Perceptol

6 times for 1+1, 1+3, stock, EI 50–125, 20 °C. From HARMAN technology FP4 PLUS Technical Information (2018-11).

Box speed (EI 125), 20 °C, 1+1, intermittent
15:00
Box speed (EI 125), 20 °C, 1+3, intermittent
21:00
Box speed (EI 125), 20 °C, stock, intermittent
12:00

Times

1+1 · intermittent

Ilford FP4 Plus in Ilford Perceptol 1+1 · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
5013:00
12515:00

1+3 · intermittent

Ilford FP4 Plus in Ilford Perceptol 1+3 · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
5017:00
12521:00

Stock · intermittent

Ilford FP4 Plus in Ilford Perceptol Stock · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
509:00
12512:00

Source: HARMAN technology FP4 PLUS Technical Information (2018-11)

Time in min:sec. A dash means the source gives no time for that combination; rolllog doesn't fill gaps. These are starting points: test with your own process.

Ilford FP4 Plus in other developers

Other films in Ilford Perceptol

Same data from the API

curl "https://rolllog.io/api/v1/films/ilford-fp4-plus/dev-times?developer=ilford-perceptol"

All of Ilford FP4 Plus: exposure, reciprocity, formats and prices.