12 Tips for Using a Film Developing Tank
Friday, April 20th, 2012
Following on from the previous article titled Processing Film in a Developing Tank it seems useful to supply a short list of random tips that should make the process more understandable to anybody wanting to give it a try. Hopefully, my mistakes can save others from repeating them.
- After each developing session I tend to wash the spool in soap and water then dry it in a fresh breeze because any residual chemical or miniscule dampness causes the film to stick when feeding onto the spool.
- A handy place to develop film is in the bathroom. Before a developing session run a hot shower for five minutes to capture dust. Then wipe down surfaces & quick damp mop the floor to collect the dust.
- When loading the spool: use your fingers to drag the first part of 120 film into the spool for about 4 centimetres… the first part of the film has no images.
- Consult a developing chart from the chemical manufacturer for mix ratios and corresponding times (ie. Ilford’s Film Processing Chart). Note also, these are starting points not fixed and fast rules.
- Exact chemical ratios: buy a medicine measuring cup or a purpose designed photographic measuring cup for preparing your chemicals.
- Measure the temperature of your chemicals with an oven thermometer (sit the jugs in a baking dish so you can add ice or boiling water to the dish to attain the exact chemical temperature – I place the thermometer in the developer).
- Be precise: the three ways you can affect film development are time, temperature and strength of the developer. Precision is your control.
- Consistency is also key to control: the more consistent you can make the developing process the more you will be able to predict the resulting negatives.
- There is ‘good enough’ developer and there is ‘the best’ developer. Choice of chemical can be as important as choice of film – economically and for the quality of the negatives.
- You can pull process over-exposed film and push process under-exposed film so understand your options while shooting (ie. 100 ASA film shot inside a building can be pushed 1 or 2 stops to either 200 or 400). The effect of pulling film in development is lower contrast and the effect of pushing film in development is higher contrast and grain.
- The developer stage of processing film negatives is a lot more sensitive & unforgiving than the stop bath or fixer stages.
- A portable film drying cabinet prevents a large amount of dust from reaching wet negatives.


