Kodak D76 print drum developing

[tjc51]

I'm sure this question has been asked before, but I can't find it. I am going to develop 4x5 film in a 8x10 print drum. I will be using Kodak d76 developer. How many ounces of D76 per sheet ? I'll be doing 1+1 with the D76. I can fit 4 4x5 sheets in the drum but I'm not sure I can get enough developer in the drum for 4 sheets. I was always under the thought that it is 4 ounces developer per each 4x5 sheet ? If so, 4 sheets can't be developed in the drum. thanks--tom

[Roger Thoms]

Based on my experience with BTZS tubes and D76 1+1 you'll be fine with 2 oz per sheet. Hope that helps.

Roger

[Bill Burk]

Although 4 ounces 1:1 mixed solution is the capacity of D-76, Roger is probably right that it's OK to use 2 ounces.

The spec sheet says increase development time by 15% when developing past capacity. And I have seen my Contrast Index fall by 15% when I developed past capacity.

So I think the worst thing that will happen is your development times may be longer (maybe 15%) than spec sheets or dev charts.

[Michael Cienfuegos]

I have been using a Unicolor 8x10 print drum for 4x5. It works quite well. BTW, I have some very small plastic spring clamps which work well as separators to keep the negatives separate.

[bobwysiwyg]

BTW, I have some very small plastic spring clamps which work well as separators to keep the negatives separate.

You wouldn't happen to have a pic or source for these clamps would you?

[ic-racer]

So I think the worst thing that will happen is your development times may be longer (maybe 15%) than spec sheets or dev charts.

I know Bill is posting from good experience when recommending 2oz per sheet so I'm sure that is good information. In my experience the actual "Worst Thing That Can Happen" with developer exhaustion during a process is uneven development, where the center of the sheet is under developed. So, keep an eye out for that when extending the limits of developer capacity.

[Michael Cienfuegos]

You wouldn't happen to have a pic or source for these clamps would you?

Check the Harbor Freight catalog on line. I use the one inch spring clamps in the set item # 69374. $4.95 for a 22 piece set of inch and inch and one half clamps.

m

[bobwysiwyg]

Michael, thank you.

[tjc51]

Thanks for all of the replys. They will make my developing go much smoother.I decided to try the print drum on 4x5's with my Chromega Drum II. I'm rather new to large format and have been tray processing
up to now.The drum has some plastic clamps(they are white,about 1/4 inch wide and about 2 inches long) with it that I beleive will keep the film separate while processing. If I run into more questions I'll be back !!
I'll pay very close to the development through out the negative.
thanks again to all.

[Bill Burk]

I'd take ic-racer's advice...

You always could mix up a full batch and use half for the first half of development time, pour it out and use the second half of developer for the second half of the development time.