[alt-photo] Re: Sodium Citrate Developer formula

[Loris Medici]

Ok, that means you need excess citric acid. Alkaline developer isn't a
good idea for kallitype and/or pt/pd right?

Francis, you'll need to add more citric acid (or less carbonate /
bicarbonate) than what I've wrote before; those formulas were
carefully balanced, giving (almost pure) sodium citrate as the
result...

Regards,
Loris.


2010/5/16 Alberto Novo <alt.list at albertonovo.it>:
> Don,
>>
>> Check the pH. Your target is 7.0. If it is less than 7 add sodium
>> carbonate.
>> If it is above 7 add citric acid.
>
> Unless you wish to prepare a pH 7 solution, the pH of trisodium citate is
> close to 8 or more...