Ralph,I'm awre this is a bit silly of a question because this developer was designed to get a liquid D76-type developer and, at the same time, to get away from mixing powders. Still, it is supposedly using phenione as one of the development agents, which gives it unique properties that I like to try! Can you please share a formula for mixing it from bulk?
Ralph,
I don't think you'll get an answer to your question. You might get a guess, but that's all. Claytons sells the stuff and I really don't think they want anything near their formula/recipe out in the publics hands. You know, "Trade secrets"!
If that's the case, I'll patch it together from the MSDS eventually.
already gathered that it is identical to D76 but uses phenidone in place of metol; just need to know in what ratio. 1:10 is my first guess.
Agree with everything Marcelo posted, but with one addition: earlier in this thread (above), Albada posted a formula for D76 using Phenidone at 1/10 the quantity of Metol. did this many years ago (before F76+ was likely a commercial product). It did, indeed, produce descent negatives (mostly using the version of TriX that was current during the late 1990s), but it certainly was NOT Claytons F76+.Hello. Ive used D76, F76+ and E76 (Phenidone/bórax version of D76).
I belive the only thing they have in common is the 76 part. All of them are pretty fine developer but consider them different beast.
My favorite one is F76+. Good luck with getting it replicated.
Here is the msds of F76+:
You can make the difficult to obtain potassium sulfite from potassium bisufite and potassium hydroxide (hazardous).
There could be an undisclosed small quantity of phenidone but NMP has a ring structure which does resemble phenidone though no NH. It is an alkaline solvent miscible with water.
Some years ago, I read that F76+ was essentially FA-1127 (or some such thing), but even if this were the case (which is unlikely), I don’t think that the formula for FA-1127 is available either.
Agree with everything Marcelo posted, but with one addition: earlier in this thread (above), Albada posted a formula for D76 using Phenidone at 1/10 the quantity of Metol. did this many years ago (before F76+ was likely a commercial product). It did, indeed, produce descent negatives (mostly using the version of TriX that was current during the late 1990s), but it certainly was NOT Claytons F76+.
If you read further into the SDS Phenidone is listed (along with other ingredients such as solvents, restrainers, chelating agents.
It is a PQ liquid concentrate with a relatively high pH, superficially appearing to have more in common with an HC-110 type.
Of course a list of ingredients and chemical properties does not necessarily mean it doesn’t ultimately produce similar results to D-76 - there are many ways to very similar endpoints - but strictly from a formulation perspective it’s strange to put “76” in the name.
You’re not going to be able to accurately reverse-engineer it from the SDS even if you acquire all the ingredients.
By the way, Arista Premium Liquid Film Developer is F76+ on another package.
NMP has a ring structure which does resemble phenidone though no NH. It is an alkaline solvent miscible with water.
NMP cannot act as a reducing agent. It is also not alkaline, as the nitrogen forms part of a cyclic amide (a lactam). I suspect its role here is merely to help solubilise the other components at higher concentration.
as NMP pH in solution is 8.5-10 which is close to the pH 9.7 of F76+
Replacing metol with phenidone would result in a PQ developer. According to this website:
http://www.film-and-darkroom-user.org.uk/forum/archive/index.php/t-682.html ,
the following formula is "an Ilford PQ version of ID-11."
Here's the formula:
Sodium Sulphite anhyd ..... 100 g
Hydroquinone .................... 5.0 g
Phenidone ......................... 0.2 g
Boric Acid .......................... 2.7 g
Borax ................................. 6.8 g
Potassium Bromide ........... 1.0 g
I removed the sequestering agent and related chemicals. Note that due to its containing both borax and boric acid, this formula buffers better than the original D-76, so pH-shift with age should not be a problem.
Mark
EDIT: If you change borax to 3g and boric acid to 3.5g, you will have the Ilford Replenishing Developer, which the FDC recommends instead of ID-68. But the lower pH (of 8.95) will need longer dev times.
Yes, I remember that and think I was in that discussion. I think it was FA-1027, but could be mistaken.Some years ago, I read that F76+ was essentially FA-1127 (or some such thing), but even if this were the case (which is unlikely), I don’t think that the formula for FA-1127 is available either.
Agree with everything Marcelo posted, but with one addition: earlier in this thread (above), Albada posted a formula for D76 using Phenidone at 1/10 the quantity of Metol. did this many years ago (before F76+ was likely a commercial product). It did, indeed, produce descent negatives (mostly using the version of TriX that was current during the late 1990s), but it certainly was NOT Claytons F76+.
Yes, I remember that and think I was in that discussion. I think it was FA-1027, but could be mistaken.
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