If a working stock solution of D-23 is made (using metol and sodium sulfite), how long does it last? I plan on using it 1:1 and if I make 1 liter of stock, how long will the remaining 1/2 liter of stock last?
I realize that the whole point of mixing from power is to have fresh solution every time and not keep it. I am curious as to how long stock solution would last in a tightly capped glass bottle.
Thanx in advance.
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