Roller for film developing HOW

Film developing use a Roller Base, Tanks and Drums
I have look at one on YouTube How fast do they rotate / RPM and do they have to change direction
I was think of using a lathe for rotation

Dave

My Unicolor base runs at about .5 rpm and reverses direction a little over one revolution when using my unicolor film drum.

I use a Beseler 8x10 drum and motor for my 4x5 black and white negs. The motor turns at 60 rpm. I can do 2 sheets at a time using the divider and 3oz. of chemistry. The motor does reverse but, I don't use it.

Thank you I have a lathe that goes dow to 56 rpm

Dave

Quote:

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Originally Posted by DG 3313

I use a Beseler 8x10 drum and motor for my 4x5 black and white negs. The motor turns at 60 rpm. I can do 2 sheets at a time using the divider and 3oz. of chemistry. The motor does reverse but, I don't use it.

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Oops, I meant 30 rpm (.5 revs per second).

I hope 56 RPM will work???

Thank you
Dave

Check the level of your tube and use a little extra chemistry. I have streaked negs. by not doing this......

Beseler calls for 2oz. of chemistry in the 8x10 drum....I use 3 oz. to keep the development as even as possible. I have been using the same drum and motor since 1993.

In order to assure random distribution, the better machine also rocks using eccentric wheels.