In my country Kodalk (sodium metaborate) isn't available for purchase. I know what kodalk can be replaced with borax+NaOH and sometime I used this. But now I want find other solution for buffer with same pH, because I don't like working with NaOH.
I found that carbonate-bicarbonate isn't good for kodalk replacement because optimal pH range for this system is 9.5..10.5.
Other possible substitution is DEA with pH in range 10.5..11.5. Maybe mixture of TEA+DEA will be good buffer in range 10..11.
In Anchell "Darkroom Cookbook" I found next recomendation for substitute kodalk:
I haven't found any details in google about carbonate-borax buffer, just only that such type of buffer used for pH in range 10-11. Someone try this?Yet another substitution is to use 4 parts sodium carbonate, monohydrate, and 1 part borax to equal the same weight of Balanced Alkali (e.g., 10.0 grams of Balanced Alkali equals 8.0 grams of carbonate and 2.0 grams of borax).