Developing tanks

Kodak gives developing times for both large and small developing tanks. I am wondering what is considered a large

developing tank and what is considered a small developing tank. (For 35 mm film)

Thanks,

Susannah

Small tanks hold up to 8 rolls of 35mm film. Large tanks start at holding 6 sheets of 4x5 film on hangars. They are the

size of a very small car battery and go up from there. The small sheet film tank holds 1/2 gal. liquid. Generally you use 3

or more.

Although they also give indications regarding the volume (8 to 16 ounces for "small" tanks and 0.5 to 3.5 gallons

for "large" tanks), my impression is that it's not so much a matter of volume as a matter of procedure. They try

to differentiate between tanks inverted by hand and open tanks used with hangers or baskets. The differences in

developing times are caused by the different agitation styles, rather than the different volumes.<br>

With inversion tanks, whether plastic or stainless steel, I would always use the times for "small tanks"

regardless of volume. They are just starting points, anyway.

I think Vlad is correct if that is what you are getting at. I have done 35mm on reels with a lift rod in a 4x5 tank using small tank times and a lift and twist 2 times each 30 sec just like a small tank. Film developed properly.

Traditionally sheet film is only agitated one agitation cycle per minute and the development takes a longer time as a result.