rolllog

Development times

Ilford HP5 Plus in Ilford Perceptol

6 times for stock, 1+1, 1+3, EI 50–320, 20 °C. From HARMAN technology HP5 PLUS Technical Information (2018-11).

Times

Stock · intermittent

Ilford HP5 Plus in Ilford Perceptol Stock · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
509:00
1009:00
20011:00
25013:00

1+1 · intermittent

Ilford HP5 Plus in Ilford Perceptol 1+1 · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
32018:00

1+3 · intermittent

Ilford HP5 Plus in Ilford Perceptol 1+3 · intermittent: time in minutes:seconds by exposure index and temperature
EI20 °C
32025:00

Source: HARMAN technology HP5 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 HP5 Plus in other developers

Other films in Ilford Perceptol

Same data from the API

curl "https://rolllog.io/api/v1/films/ilford-hp5-plus/dev-times?developer=ilford-perceptol"

All of Ilford HP5 Plus: exposure, reciprocity, formats and prices.