Ilfostop
Development times
No development times published yet
Nothing is filled in with a guess here. A time is published only once it has been read off a primary source, because a plausible wrong time costs somebody a roll they cannot reshoot.
Reuse
Checked 21 October 2026
Ilford says Ilford Ilfostop may be used for more than one film.
The maker doesn’t publish a rule for lengthening the time, so the calculator makes no correction.
Capacity, as the maker states it: 15 x 135-36 films per litre of working solution (1+19), unreplenished.
ILFORD ILFOSTOP ... Dilution 1+19 ... Time (sec) at 20°C (68°F) 10 ... Capacity (films per litre, unreplenished) 15x (135-36)
Dilutions
- 1+19 1 + 19 water
Link to this page
Specification
- Type
- Stop bath
- Form
- Liquid concentrate
- Capacity rolls per litre
- 15.0
- 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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Suggest a time or report a mistake.
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