FORMULAs
FILM DEVELOPERS
Development Time
For some FORMULAs, such as Kodak D-76, time/temperature data is readily available from Kodak. Where possible I have included a range of times. Other FORMULAs will have to have times determined for your working methods. When in doubt follow Gordon Hutching’s maxim,“It’s always 12 minutes.”
When a film developing-time range is given it is for films rated by the manufacturer between ISO 100 and ISO 320, unless otherwise stated. To choose a starting time, use this rough rule of thumb: For films rated between ISO 100 and ISO 320, use a time in the middle of the range. For films rated from ISO 12 to ISO 80, decrease the development time from the midpoint by 25%. For films rated higher than ISO 320, increase ...
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