150 gms of citric acid plus 120 gms of sodium carbonate in 1 liter of water makes a 20% sodium citrate solution.
Dissolve the the citric acid first in a large container (I use 130-140 degree water) than slowly add the sodium carbonate. It will produce a lot of CO2.
one item less on the shopping list! (after i've used up the pound i still have)
edit: is the carbonate monohyd. or anhydrous?
It will not mater for this purpose if you use anhydrous or not.
Originally Posted by phritz phantom
Ah yes, home made sodium citrate!
Just a thought... you may be unsatisfied with the results of the off the shelf store bought sodium citrate. Be prepared to do some fiddling to match what you got with your home brew.
I made my own sodium acetate kallitype developer by reacting 5% distilled vinegar with baking soda. Then decided I could better spend my time taking photographs and bought sodium acetate from a supplier. Big difference in image tone. Might brew a gallon of my own again soon.