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Due to differences in cameras, lenses, developing techniques and exposure conditions, the above times should only be used as
guidelines for your own exposures. Always expose for the desired shadow detail and develop for the desired separation in the high values.
Times given are for development of 120 roll film in small tanks, optimized for enlarging with a cold light head. Since I
presoak my film, I add 30 seconds of developing time that I do not record (assuming it takes that long for the developer to diffuse into the swollen emulsion).
My times are generally longer than those provided by Gordon Hutchings (I agitate less, optimize for cold light, and seek maximum shadow detail).
I give continuous agitation for the first 30 seconds of development, then 5 seconds of agitation every 30 seconds
thereafter. Gordon Hutchings recommends at least 3 or 4 agitations per minute to prevent uneven development in roll film tanks, but I have not had problems with my method.
(See My Development Techniques.)
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