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Ilford Photo

Ilfotec LC29

B&W developer Liquid concentrate In production Reusable at some dilutions

Development times

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Showing 2 of 127 published times.

Film Dilution EI Time Source
Ilford Delta 100 Pro 1+19 20.0 °C 100 6:00
Verified Datasheet Report
Ilford Delta 100 Pro 1+29 20.0 °C 100 7:30
Verified Datasheet Report

Reuse

Checked 21 October 2026

Ilford says whether Ilford Ilfotec LC29 may be reused depends on how it is used.

  • 1+9 may be reused
  • 1+19 may be reused
  • 1+29 use once

1+9: +10 % development time for each successive film in a litre (N, N+10 %, N+20 % ...), up to N+90 % for film 10.

1+19: +10 % development time for each successive film in a litre (N, N+10 %, N+20 % ...), up to N+40 % for film 5.

Capacity, as the maker states it: Reused working solution: 10 films per litre at 1+9, 5 films per litre at 1+19; 1+29 is one-shot.

With ILFOTEC LC29 there is a choice of dilution - 1+29, 1+19 and 1+9 - and the option for either one-shot processing or for greater economy to reuse the diluted developer solution during one working session. ... Working strength solutions of ILFOSOL S 1+9 and 1+14 and ILFOTEC LC29 1+29 are described as a one-shot developers. They should be used only once and discarded, we do not recommend reusing them to process more than one film. ... For the highest image quality ILFOTEC DD-X 1+4 and ILFOTEC LC29 1+9 and 1+19 should also be used as one-shot developers. For greater economy they can be reused to process either a number of films individually or multiple films in batches.

ILFORD ILFOTEC DD-X, ILFOTEC LC29 AND ILFOSOL S FILM DEVELOPERS (Harman, June 2010, 10 pp.) ↗

Dilutions

  • 1+9 1 + 9 water
  • 1+19 1 + 19 water
  • 1+29 1 + 29 water

Link to this page

Specification

Type
B&W developer
Form
Liquid concentrate
Capacity rolls per litre
—
Shelf life, unopened
—
Shelf life, opened
—

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