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Rent NowILFORD Microphen is a fine-grain powder developer built to get the most speed
out of a film, which makes it a standard choice for push-processing. Most
speed-increasing developers coarsen the grain as they go; Microphen’s low
alkalinity keeps grain size down and stops it clumping, so you gain speed while
holding grain closer to what a normal developer would give. With many films it
supports pushing to EI 3200 — ILFORD HP5 Plus being the common example.
Development times at 68°F (20°C)
| Film | Stock | 1+1 | 1+3 |
|---|---|---|---|
| Delta 100, 35mm | 7 min | 10 min | 15.5 min |
| Delta 400, 35mm at ISO 400 | 7 min | 10.5 min | 18 min |
Capacity and storage
- Stock solution — up to 10 rolls of 35mm or 120 per liter; keeps 6 months unopened, 1 month once half used.
- 1+1 dilution — up to 5 rolls of 35mm or 120 per liter.
- 1+3 dilution — one-shot only.
- Diluted solutions at either ratio must be used once and discarded. They don’t keep.
