fdonadio
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Hello, guys and gals!
I've searched the forums before posting, but it isn't exactly clear for me yet.
I have access to 85% TEA (Triethanolamine) in my area. It's mostly TEA with 15% DEA (Diethanolamine). The "pure" stuff (99%?) is nowhere to be seen.
@Photo Engineer says he uses Photographers Formulary TEA and that it is 85% — just like the one I have access to — and, most importantly, that it works. He advises, though, that the DEA will result in higher pH and, therefore, higher developer activity.
Now the question is: I have seen many formulas here — for both B&W and color film and paper — that use TEA, but they don't specify the concentration. I assume they call for pure TEA. If I'm using 85% TEA, should I adjust the quantity?
I understand that, if the formula specifies the pH of the final product, I can use a diluted acid to bring the pH down to it and that this is pretty much standard practice.
Cheers,
Flavio
I've searched the forums before posting, but it isn't exactly clear for me yet.
I have access to 85% TEA (Triethanolamine) in my area. It's mostly TEA with 15% DEA (Diethanolamine). The "pure" stuff (99%?) is nowhere to be seen.
@Photo Engineer says he uses Photographers Formulary TEA and that it is 85% — just like the one I have access to — and, most importantly, that it works. He advises, though, that the DEA will result in higher pH and, therefore, higher developer activity.
Now the question is: I have seen many formulas here — for both B&W and color film and paper — that use TEA, but they don't specify the concentration. I assume they call for pure TEA. If I'm using 85% TEA, should I adjust the quantity?
I understand that, if the formula specifies the pH of the final product, I can use a diluted acid to bring the pH down to it and that this is pretty much standard practice.
Cheers,
Flavio