D76 1:1

[Marvin]

I was considering using D76 1:1 but I use a 16oz. SS tank and am not sure that is enough developer for 2 36 exp. rolls. I thought I herd that you would need to extend developer time if you used 1:1 for two rolls in a 16oz tank. I wonder how others are doing it.

 

[chriscrawfordphoto]

It isn't enough developer. You need, according to Kodak's directions, a 30 oz tank to do two rolls of film in D-76 1+1. I use a 4-reel SS tank with a blank reel in the bottom, two reels with film on them in the middle, and another empty reel on top for D-76 1+1 and it works great.

 

[kauffman v36]

i use a 16oz. tank for either 2 36 exp 135mm rolls or 1 120 roll. the SS tank takes 2 35mm reels and i just setup in a beaker 8 oz d-76 stock sol. + 8 oz water, acheiving a temp. somewhere around 68 F, within a degree or two. digitaltruth.com gives you the times for the 1+1 dev. and its always worked for me, i almost never use d-76 straight.

 

[Marvin]

Does this also apply to other developers like XTOL 1:1. What are the advantages to using D76 1:1 over stock solution. I know that D76 is a long time favorite but how does it compare to XTOL.

 

[RalphLambrecht]

I use 270 ml of D76 1+1 per film without a problem.

 

[rmolson]

Gee I didn't know you could not develop two rolls of 35mm in 500mm of D-76 Been doing it for 40 years. Maybe it's like the bee Aerodynamically it can't fly but the bee not knowing this goes on flying anyway.

 

[aste]

I've read that you need a minimum of 250ml of stock developer per roll of 36 exposures of 135, roll of 120, or sheet of 8x10.

1:1 - 1 part 250ml of developer + 1 part 250ml of water = 500ml

1:3 - 1 part 250ml of developer + 3 part 250ml of water = 1000ml/1L

So, a 1 liter cylinder will hold enough solution to develop 2 rolls of 36 exposure 35mm film 1:1, or 1 roll of the same, or 120 film 1:3.

As far as I know, it is the same for Xtol.

 

[aste]

Gee I didn't know you could not develop two rolls of 35mm in 500mm of D-76 Been doing it for 40 years. Maybe it's like the bee Aerodynamically it can't fly but the bee not knowing this goes on flying anyway.

Are you using D76 stock?

 

[pentaxuser]

We've been here before and not so long ago in respect of the minimum amount of developer needed and you must make up your mind as to which opinion you accept but here's something for you to consider. Most here agree that for all practical purposes ID11 and D76 are identical. A gentleman called John Tinsley wrote a book on rotary processing which is still most sought after.

He developed various Ilford films with ID11 in Jobo rotary tanks at 1+1 successfully. Two 35 mm films require 240mls of liquid for rotary processing. At 1+1 this means 120mls of stock solution.

There are several conclusions to be drawn:
1. Mr Tinsley's films were all inadequately developed in ID11( same as D76)despite his success as a processor and he is either incompetent because he cannot recognise inadequately developed films or he knows that his films are indequately developed and despite this makes these wrong statements in which case he is a charlatan.
2. Kodak has got the minimum quantity required wrong.
3. ID11 and D76 are NOT the same developer at all in terms of the minimum required and Kodak has got it right for its D76 and Ilford has got it right for its ID11. NB If this is the case then unless ID11 is much more expensive then it is the cheaper developer

pentaxuser

 

[fschifano]

There are several conclusions to be drawn:
1. Mr Tinsley's films were all inadequately developed in ID11( same as D76)despite his success as a processor and he is either incompetent because he cannot recognise inadequately developed films or he knows that his films are indequately developed and despite this makes these wrong statements in which case he is a charlatan.
2. Kodak has got the minimum quantity required wrong.
3. ID11 and D76 are NOT the same developer at all in terms of the minimum required and Kodak has got it right for its D76 and Ilford has got it right for its ID11. NB If this is the case then unless ID11 is much more expensive then it is the cheaper developer

1. Not necessarily incompetent nor a charlatan.

2. Kodak is being overly conservative. It is possible to operate successfully with less, though I suspect that for heavily exposed film (high key scenes) where more than an average amount of silver needs to be reduced, it might not be enough without compensating with a little more time. My personal minimum for a 80 square inches of film is 200 ml. of stock D-76. Even though that's a little shy of Kodak's recommendation, I'm fairly sure that my films are properly developed. Front lit subjects print very well, and with good contrast, on the equivalent of a #2 paper. Argue sensitometry all you like, this is pretty much a valid test for adequate exposure and development.

3. I can tell you from personal experience that ID-11 and D-76 behave identically. I have used both interchangeably, and can discern no difference in the results obtained with either one.

 

[Marvin]

OK I looked at the Kodak info and it appears that if I used my 16oz tank to develop 2 35mm 36 then I would need to add 10 percent to the 1:1 times. Would there be any bad effects of doing it this way or should I use D76 straight or get a bigger tank for 2 36 rolls.

 

[Marvin]

From Kodak document:
the film fully in the recommended time. We recommend
always starting with at least 100 mL (3.5 fluidounces) of
full-strength developer to prepare the diluted solution for
each 135-36 or 120 roll (or the equivalent of 80 square
inches [516 square centimetres]). For example, when
processing 4 rolls of film with developer diluted 1:1, use at
least 800 mL even if the processing equipment will allow
the use of less solution.

It appears that XTOL only requires 3.5 oz of stock solution per roll so 1:1 in a 16oz. would be fine.