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D76 versus ID11, Are they the same things ?

Published versions from both manufacturers (dates unknown).



 
So if ID 11 and D76 are the same formula who does ILford recommend different times for 1:1 and push, about 20% more for ID 11?
 
Same film same formula, different times, would Kodak's commercial version with buffers made a -20% difference when diluted or extended development times?
 
Paul Howell said:
So if ID 11 and D76 are the same formula who does ILford recommend different times for 1:1 and push, about 20% more for ID 11?
Click to expand...

(I was gonna say it's because they were hung over the morning they tested the D76.)

Because commercially they're not identical. Each product contains what the different manufacturers put in. Kodak adds stuff to make it a single powder. Ilford keeps it two. Whatever differences there are a minute. And the weird times Ilford offers for the greater dilutions of the two different products may be a result of those minor differences - ones that only become apparent at the greater dilutions.
 
Paul Howell said:
So if ID 11 and D76 are the same formula who does ILford recommend different times for 1:1 and push
Click to expand...

Really wonder how they did their tests and what they were aiming for. Some wild differences when comparing the times for Pan F on Ilford's 1993 film development chart. Some of these don't make sense.



 
Yeah, and here's the Delta 100 one, again:



And the times go in the opposite direction.
 
Perhaps other parameters come into play. I have never made up ID11 from powder, but with D76 you have to wait quite a time for the mixture to dissolve before topping up with cold water. Is this the same for ID11?
 
They're only recommended starting points folks.

Too many variables when home processing for them to be anything else.
 
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