What order do the steps go in when developing black and white film?

Optional pre-wash, then develop, stop, fix, wash, and a final wetting agent bath before drying. Only the development step has a time specific to the film and developer; the others are broadly the same whatever you are developing.

How do I keep track of several timed steps while my hands are wet?

The difficulty is not knowing the times but running them back to back without a gap while handling a tank. Resetting a phone timer between each step is where steps get skipped, and the one that gets skipped is usually the short stop bath rather than the long development. An app that advances through the sequence on its own and signals each boundary removes the need to remember where you are.

Can I skip the stop bath and just use water?

Plain water is a common substitute and works by dilution rather than by neutralising. It is slower to halt development than an acid stop bath, so the transition is less sharply defined, but for most black and white work it is considered acceptable. What matters more is that the step happens at all.

What happens if I under-fix film?

Undeveloped silver halide is left in the emulsion, and the negative can discolour or stain over time, sometimes not immediately. Because the damage appears later, fixing is a step worth timing properly rather than judging by eye.

Develop, stop, fix, wash

Only one step has a time that depends on what you are developing. The development step is specific to the film, the developer, the dilution and the temperature. Everything after it is broadly the same whatever is on the reel.

The sequence

Step	Roughly	What it is for
Pre-wash	1 min	Optional. Brings tank and film to temperature. Some developers advise against it
Develop	Per recipe	The image is formed. The only step timed to your specific combination
Stop	30 sec	Halts development at a defined point
Fix	Several min	Removes undeveloped silver halide, making the image stable in light
Wash	Several min	Removes the fixer. Residual fixer is why negatives deteriorate in storage
Wetting agent	30 sec	Water runs off evenly so the film dries without marks

Exact times come from the developer's own instructions and from the recipe you are following. The figures above are the shape of the process, not a recipe.

The step people actually miss

It is not the development step. That one has your full attention: it is the long one, it is the one with a number attached to it, and getting it wrong is the thing everyone worries about.

It is the thirty second stop bath. It runs immediately after a step you were concentrating on, it is short enough that resetting a timer for it feels like more work than counting, and skipping it produces a negative that is not obviously wrong, just slightly further developed than intended, in a way you will attribute to something else.

This is a sequencing problem rather than a knowledge problem. The times are not hard to find. Running four of them back to back, in order, with wet hands and a tank in them, is where it breaks down.

Agitation belongs to the development step

How you agitate is part of the recipe, not a separate preference: a time published for inversions every minute does not hold if you invert continuously. Agitation moves fresh developer across the emulsion, so more of it develops faster. If a recipe specifies a scheme, it is describing the conditions its time was measured under.

Get the app

How to calculate a developer dilution 1+50 is fifty-one parts, not fifty. Worked examples and a calculator Developing at the wrong temperature Why 22°C instead of 20°C is a different recipe FilmDevMate Runs the whole sequence on a timer that advances between steps on its own. Free on iOS and Android.