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Ilford Photo

ID-11

B&W developer Powder In production Reusable undiluted only

Development times

Film Dilution EI Time Source
Paul & Reinhold stock 20.0 °C 640 9:00
Verified Datasheet Report
Paul & Reinhold 1+1 20.0 °C 640 15:30
Verified Datasheet Report

Reuse

Checked 21 October 2026

Ilford says whether Ilford ID-11 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+90 % for film 10.

Capacity, as the maker states it: 10 x 135/36 or 120 films per litre of stock solution when reused without replenishment.

The table below gives the number of 135/36 or 120 roll films a litre of stock PERCEPTOL, ID-11 and MICROPHEN can process provided that the developer is reused. ... We do not recommend reusing diluted developers, 1+1 and 1+3, always use fresh solutions on each occasion.

ILFORD Technical Information: Perceptol, ID-11 and Microphen Film Developers (Harman, Aug 2024) ↗

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

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Specification

Type
B&W developer
Form
Powder
Capacity rolls per litre
10.0
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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