Interactive 3D tool

Developing Tank Simulator

Pour, agitate, drain and fix — with real chemistry colours and timings.

Stage 1 / 7 Chemistry water

Drag to orbit · scroll to zoom

Three developing trays with chemistry and a thermometer

WebGL is unavailable on this device, so the animated 3D tank cannot run. The stage list on the right walks the same sequence with the same timings.

Educational simulationThe timings shown are published approximations for a small inversion tank at 20 °C. They are not a substitute for the data sheet for your own film and developer. Never open a loaded tank in the light, and always ventilate the room you work in.

Temperature compensation

Development activity changes by roughly four percent per degree Celsius. The recommended time in the readout is recalculated live as you move the temperature slider — that is exactly what the correction does to your negatives.

Chemistry colours

The liquid changes colour as the stage changes: pale yellow for developer, orange for the acid stop bath, near-transparent for fixer. In a real tank you see none of this — which is why the discipline of the sequence matters.

Keep going

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