How much Borax in D-76

[norm123]

Hi
I want to make my own D-76, I have all products but in Anchell (1994) p. 118-119, we have 2.0 grams/Litre in the formula and the notes, he said ''The "official'' published formula for D-76 recommends using 29.0 grams of borax for the accelerator. However, in its packaged Eastman Kodak uses Balanced Alkali. If desird, Balanced Alkali may be subtituted weight for weight for borax. Development time should be decreased by approximately 15% to compensate for the higher pH''.

Why this big difference between 2 and 29 grams for the same revelator?

When I use commercial D-76 saying 11minutes 20 degree Celcius. Am I supposed to add 15% more time if I use 2 grams of borax with the mobrew D-76? I'm confused.
Regards

 

[zanxion72]

Indeed, the official D-76 formula uses 2 g/l of borax (decahydrate I think). Could it be some buffered version of D-76 the one with 29 grams of borax?

 

[presspass]

An unofficial formula for D-76 calls for 2.5 g. of metal, 100 g. of sodium sulfite, and 2 g. of metaborate - that's the generic for Kodak's balanced alkali. I don't remember who published this formula but it's similar to Haist's D-76, who used borax.

 

[bernard_L]

he said ''The "official'' published formula for D-76 recommends using 29.0 grams of borax for the accelerator.

???
Among the numerous variants the one stated to be closest to the packaged version is D-76d, in which 2g borax is replaced with 8g borax + 8g boric acid. It's supposed to be better buffered.

 

[Doremus Scudder]

...I have all products but in Anchell (1994) p. 118-119, we have 2.0 grams/Litre in the formula and the notes, he said ''The "official'' published formula for D-76 recommends using 29.0 grams of borax for the accelerator....

Typographical error. Anchell is full of them. 2g is right.

 

[norm123]

Typographical error. Anchell is full of them. 2g is right.

Thank you. It makes sense.

 

[Gerald C Koch]

Despite periodic claims, I've not seen any evidence the packaged version is closer to D-76d.

+1