Perceptol
B&W developer
Powder
In production
Reusable undiluted only
Development times
| Film | Dilution | EI | Temp | Time | Agitation | Source |
|---|---|---|---|---|---|---|
| T-Max 100 | stock | 100 | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| T-Max 100 | 1+1 | 100 | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| T-Max 100 | 1+3 | 100 | 20.0 °C | 19:00 | Ilford — 4 inversions every 60 s | |
| T-Max 400 | stock | 400 | 20.0 °C | 11:00 | Ilford — 4 inversions every 60 s | |
| T-Max 400 | 1+1 | 400 | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| T-Max 400 | 1+3 | 400 | 20.0 °C | 17:00 | Ilford — 4 inversions every 60 s | |
| Plus-X Pan | stock | 64 pull 1 stop | 20.0 °C | 8:00 | Ilford — 4 inversions every 60 s | |
| Plus-X Pan | 1+1 | 64 pull 1 stop | 20.0 °C | 8:30 | Ilford — 4 inversions every 60 s | |
| Plus-X Pan | 1+3 | 64 pull 1 stop | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Tri-X 400 | stock | 200 pull 1 stop | 20.0 °C | 10:00 | Ilford — 4 inversions every 60 s | |
| Tri-X 400 | 1+1 | 200 pull 1 stop | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Tri-X 400 | 1+3 | 200 pull 1 stop | 20.0 °C | 15:00 | Ilford — 4 inversions every 60 s | |
| Agfapan APX 100 | stock | 50 pull 1 stop | 20.0 °C | 9:00 | Ilford — 4 inversions every 60 s | |
| Agfapan APX 400 | stock | 320 pull 0.25 stops | 20.0 °C | 14:00 | Ilford — 4 inversions every 60 s | |
| Agfapan APX 400 | 1+1 | 320 pull 0.25 stops | 20.0 °C | 17:00 | Ilford — 4 inversions every 60 s | |
| Agfapan APX 400 | 1+3 | 320 pull 0.25 stops | 20.0 °C | 24:00 | Ilford — 4 inversions every 60 s | |
| Neopan 400 Professional | stock | 400 | 20.0 °C | 10:00 | Ilford — 4 inversions every 60 s | |
| Neopan 400 Professional | 1+1 | 400 | 20.0 °C | 14:00 | Ilford — 4 inversions every 60 s | |
| Neopan 400 Professional | 1+3 | 400 | 20.0 °C | 20:00 | Ilford — 4 inversions every 60 s | |
| Holga 400 | stock | 400 | 20.0 °C | 9:00 | — | |
| Holga 400 | stock | 400 | 20.0 °C | 9:00 | — | |
| Pan F Plus | 1+1 | 25 pull 1 stop | 20.0 °C | 10:30 | Ilford — 4 inversions every 60 s | |
| Pan F Plus | 1+1 | 50 | 20.0 °C | 15:00 | Ilford — 4 inversions every 60 s | |
| Pan F Plus | 1+3 | 25 pull 1 stop | 20.0 °C | 15:00 | Ilford — 4 inversions every 60 s | |
| Pan F Plus | 1+3 | 50 | 20.0 °C | 17:00 | Ilford — 4 inversions every 60 s | |
| Pan F Plus | stock | 25 pull 1 stop | 20.0 °C | 9:00 | Ilford — 4 inversions every 60 s | |
| Pan F Plus | stock | 50 | 20.0 °C | 14:00 | Ilford — 4 inversions every 60 s | |
| FP4 Plus | 1+1 | 50 pull 1.25 stops | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| FP4 Plus | 1+1 | 125 | 20.0 °C | 15:00 | Ilford — 4 inversions every 60 s | |
| FP4 Plus | 1+3 | 50 pull 1.25 stops | 20.0 °C | 17:00 | Ilford — 4 inversions every 60 s | |
| FP4 Plus | 1+3 | 125 | 20.0 °C | 21:00 | Ilford — 4 inversions every 60 s | |
| FP4 Plus | stock | 50 pull 1.25 stops | 20.0 °C | 9:00 | Ilford — 4 inversions every 60 s | |
| FP4 Plus | stock | 125 | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Ilford Delta 100 Pro | 1+1 | 50 pull 1 stop | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| Ilford Delta 100 Pro | 1+1 | 100 | 20.0 °C | 17:00 | Ilford — 4 inversions every 60 s | |
| Ilford Delta 100 Pro | 1+3 | 50 pull 1 stop | 20.0 °C | 16:00 | Ilford — 4 inversions every 60 s | |
| Ilford Delta 100 Pro | 1+3 | 100 | 20.0 °C | 22:00 | Ilford — 4 inversions every 60 s | |
| Ilford Delta 100 Pro | stock | 50 pull 1 stop | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Ilford Delta 100 Pro | stock | 100 | 20.0 °C | 15:00 | Ilford — 4 inversions every 60 s | |
| Ilford HP5+ | 1+1 | 320 pull 0.25 stops | 20.0 °C | 18:00 | Ilford — 4 inversions every 60 s | |
| Ilford HP5+ | 1+3 | 320 pull 0.25 stops | 20.0 °C | 25:00 | Ilford — 4 inversions every 60 s | |
| Ilford HP5+ | stock | 250 pull 0.75 stops | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| SFX 200 | 1+1 | 200 | 20.0 °C | 20:00 | Ilford — 4 inversions every 60 s | |
| SFX 200 | stock | 200 | 20.0 °C | 14:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+1 | 200 pull 1 stop | 20.0 °C | 12:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+1 | 320 pull 0.25 stops | 20.0 °C | 15:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+3 | 200 pull 1 stop | 20.0 °C | 18:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | stock | 200 pull 1 stop | 20.0 °C | 10:00 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | stock | 250 pull 0.75 stops | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+1 | 200 pull 1 stop | 24.0 °C | 9:00 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+1 | 320 pull 0.25 stops | 24.0 °C | 11:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+3 | 200 pull 1 stop | 24.0 °C | 14:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | 1+3 | 320 pull 0.25 stops | 24.0 °C | 17:30 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | stock | 200 pull 1 stop | 24.0 °C | 7:00 | Ilford — 4 inversions every 60 s | |
| Delta 400 Professional | stock | 250 pull 0.75 stops | 24.0 °C | 9:00 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 400 pull 3 stops | 20.0 °C | 11:00 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 800 pull 2 stops | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 1600 pull 1 stop | 20.0 °C | 15:00 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 3200 | 20.0 °C | 18:00 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 400 pull 3 stops | 24.0 °C | 9:30 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 800 pull 2 stops | 24.0 °C | 10:30 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 1600 pull 1 stop | 24.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Delta 3200 Professional | stock | 3200 | 24.0 °C | 15:30 | Ilford — 4 inversions every 60 s | |
| Fomapan 200 Creative | stock | 200 | 30.0 °C | 2:30 | — | |
| Pan 100 | 1+1 | 50 pull 1 stop | 20.0 °C | 13:30 | Ilford — 4 inversions every 60 s | |
| Pan 100 | 1+1 | 100 | 20.0 °C | 15:30 | Ilford — 4 inversions every 60 s | |
| Pan 100 | stock | 50 pull 1 stop | 20.0 °C | 9:30 | Ilford — 4 inversions every 60 s | |
| Pan 100 | stock | 100 | 20.0 °C | 12:30 | Ilford — 4 inversions every 60 s | |
| Pan 200 | 1+1 | 100 pull 1 stop | 20.0 °C | 14:00 | Ilford — 4 inversions every 60 s | |
| Pan 200 | 1+1 | 200 | 20.0 °C | 16:00 | Ilford — 4 inversions every 60 s | |
| Pan 200 | stock | 100 pull 1 stop | 20.0 °C | 10:00 | Ilford — 4 inversions every 60 s | |
| Pan 200 | stock | 200 | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| Fomapan 400 Action | stock | 400 | 30.0 °C | 4:00 | — | |
| Fomapan 100 Classic | stock | 100 | 20.0 °C | 8:00 | — | |
| Fomapan 100 Classic | 1+1 | 100 | 20.0 °C | 10:00 | — | |
| Fomapan 100 Classic | 1+3 | 100 | 20.0 °C | 14:00 | — | |
| Fomapan 100 Classic | stock | 100 | 30.0 °C | 3:30 | — | |
| Fomapan 200 Creative | stock | 200 | 20.0 °C | 6:00 | — | |
| Fomapan 200 Creative | 1+1 | 200 | 20.0 °C | 7:30 | — | |
| Fomapan 200 Creative | 1+3 | 200 | 20.0 °C | 12:00 | — | |
| Fomapan 400 Action | stock | 400 | 20.0 °C | 9:00 | — | |
| Foma Ortho 400 | stock | 400 | 20.0 °C | 9:00 | — | |
| Foma Ortho 400 | stock | 400 | 30.0 °C | 4:00 | — | |
| Ortho Plus | stock | 80 | 20.0 °C | 13:00 | Ilford — 4 inversions every 60 s | |
| Pan 100 | 1+1 | 50 pull 1 stop | 20.0 °C | 12:00 | Ilford — 4 inversions every 60 s | |
| Pan 100 | 1+3 | 50 pull 1 stop | 20.0 °C | 16:00 | Ilford — 4 inversions every 60 s | |
| Pan 100 | stock | 50 pull 1 stop | 20.0 °C | 8:00 | Ilford — 4 inversions every 60 s | |
| Pan 400 | 1+1 | 200 pull 1 stop | 20.0 °C | 14:00 | Ilford — 4 inversions every 60 s | |
| Pan 400 | 1+1 | 400 | 20.0 °C | 16:00 | Ilford — 4 inversions every 60 s | |
| Pan 400 | 1+3 | 200 pull 1 stop | 20.0 °C | 22:00 | Ilford — 4 inversions every 60 s | |
| Pan 400 | stock | 200 pull 1 stop | 20.0 °C | 10:00 | Ilford — 4 inversions every 60 s | |
| Pan 400 | stock | 400 | 20.0 °C | 11:00 | Ilford — 4 inversions every 60 s | |
| Pan 400 | 1+1 | 320 pull 0.25 stops | 20.0 °C | 23:00 | Ilford — 4 inversions every 60 s | |
| Agent Shadow | stock | 400 | 20.0 °C | 10:00 | — | |
| S25 | stock | 25 | 20.0 °C | 8:00 | — | |
| U200 | stock | 200 | 20.0 °C | 15:00 | — | |
| U400 | stock | 400 | 20.0 °C | 12:00 | — | |
| RPX 25 | 1+1 | 25 | 20.0 °C | 10:00 | — | |
| RPX 100 | stock | 50 pull 1 stop | 20.0 °C | 9:30 | — | |
| RPX 100 | 1+1 | 50 pull 1 stop | 20.0 °C | 13:30 | — | |
| RPX 100 | stock | 100 | 20.0 °C | 13:00 | — | |
| RPX 100 | 1+1 | 100 | 20.0 °C | 16:00 | — | |
| RPX 400 | 1+1 | 320 pull 0.25 stops | 20.0 °C | 20:00 | — | |
| Retro 80S | 1+3 | 25 pull 1.75 stops | 20.0 °C | 12:30 | — | |
| Retro 80S | 1+1 | 80 | 20.0 °C | 12:00 | — | |
| Ortho 25 Plus | stock | 25 | 20.0 °C | 10:00 | — | |
| Infrared 400 | 1+1 | 400 | 20.0 °C | 10:00 | — | |
| Blackbird | 1+1 | 64 | 20.0 °C | 10:00 | — |
Reuse
Checked 21 October 2026
Ilford says whether Ilford Perceptol may be reused depends on how it is used.
- stock may be reused
- 1+1 use once
- 1+3 use once
Longer time for reuse: +10 % development time for each successive film in a litre (N, N+10 %, N+20 % ...), up to N+30 % for film 4.
Capacity, as the maker states it: 4 x 135/36 or 120 films per litre of stock solution when reused without replenishment.
ID-11, MICROPHEN and PERCEPTOL stock developers can be used in spiral tanks or deep tanks without replenishment to process either several films individually or multiple films in batches. ... We do not recommend reusing diluted developers, 1+1 and 1+3, always use fresh solutions on each occasion. ... 'One-shot' processing using stock, or 1+1 or 1+3 developers eliminates or greatly reduces these problems.
ILFORD PERCEPTOL, ID-11 AND MICROPHEN FILM DEVELOPERS (Harman, Aug 2024, 9 pp.) ↗
Dilutions
- stock undiluted stockStock solution The concentrated form of a chemical, or a developer used undiluted. Read more in the glossary ›
- 1+1 1 + 1 water
- 1+3 1 + 3 water
Link to this page
Specification
- Type
- B&W developer
- Form
- Powder
- Capacity rolls per litre
- 4.0
- Shelf life, unopened
- —
- Shelf life, opened
- —
A dash means the figure has not been read off the maker’s sheet. A guess here would produce wrong answers silently.
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