Quote Originally Posted by Photo Engineer View Post

The pH change may not be as important as buffer capacity!

Certainly that's a possibility. I've just never seen anyone trying to cram 60g into a liter of water. I've never seen a Divided D-76 that I recall that asked for that.

A simple experiment would reveal what is going on. I just mixed 4g metaborate with 3.5g metabisulphite as is used in Xtol and the pH is 8.2 with obviously lots of buffer capacity.