OK, then I think it is perfectly acceptable to decrease the time of clearing if your paper looks clear, subject to resuslts from the test discussed earlier. I generally tone with palladium and do not see any loss of density with a total clearing time of 4 minutes with 3% citric acid. You could also decrease the strength of the solution to 1.5% or 2%.
Originally Posted by philsweeney
Combining sodium citrate with citric acid would result in a less aggressive clearer. The clearing agent must be acidic to work. A 25% solution of sodium citrate has a pH of about 7.5, a 3% solution of citric acid is about pH 2.5. If you combine equal parts of the two the resulting pH is about 6, still very acidic.