D-76 Stock vs 1:1

[ibcrewin]

There is activity left in a litre of D76 1+1 after developing 4 135 rolls. Kodak's times for D76 1+1 are for 2 135 rolls in 1L of solution, but you can develop 4 rolls in 1 L if you increase the time 10%. If you develop 4 rolls of high key scenes and then try to re-use the solution for 4 more rolls of high key scenes, you then start to reach exhaustion and your development will be inconsistent.

Marty

YES! This is what I wanted to know! 4 rolls of d76 diluted 1+1 in a 1L tank. I'm going to try this this weekend.

 

[ChrisN]

Ilford ID-11 is apparently very similar to D-76. Ilford literature suggests that a litre of ID-11 stock can be used to develop up to 10 rolls of 135x36 film, without replenishment, by increasing the development time by 10% for each subsequent roll. (Page 8 of the Ilford pdf.)

I did this for a while, for economy, but found I prefer the increased sharpness that comes with 1+1 and 1+3 dilutions.

 

[dfoo]

YES! This is what I wanted to know! 4 rolls of d76 diluted 1+1 in a 1L tank. I'm going to try this this weekend.

Be careful... read Kodak's technical publication on D76 http://www.kodak.com/global/en/professional/support/techPubs/j78/j78.pdf says:

If you use D-76 Developer diluted 1:1, dilute it just before
you use it, and discard it after processing the batch of film.
Before using the diluted developer, make certain that there
are no air bubbles in the solution. If air is coming out of the
solution and forming bubbles, let the solution stand until the
bubbles dissipate. Don’t reuse or replenish the diluted
solution. You can develop one 135-3 roll (80 square inches)
in 473 mL (16 ounces) or two rolls together in 946 mL
(one quart) of diluted developer. If you process one
135-36 roll in a 237 mL (8-ounce) tank or two 135-36 rolls
in a 473 mL (16-ounce) tank, increase the development time
by 10 percent (see the following tables).

 

[GarageBoy]

Just checked the new d76 datasheet

It still conflicts with f4043 for tmax 400 times

Also noted this

"If you use Developer D-76 diluted 1:1, dilute it just before you use it, and discard it after processing one batch of film. Do not
reuse or replenish this solution.
To extend the useful capacity of Developer D-76 diluted 1:1—when processing two 36-exposure rolls in a 16-ounce tank—
increase the recommended time by about 10 percent."

What?