The recipe I have used (I got originally from Eddie Ephraums' book on
landscape photog) is 100g thio diluted in water up to 1000 cc. And the same
quantity and dilution with sodium hydroxide.  These are your two stock
solution .  Then, take a total of 60 ml of the two solutions (for cooler
prints use 10ml of thio solution + 50 ml of sodium hydroxide; for warmer
prints, reverse the ratio; and any variation in between keeping the total of
the two troner solutions to 60 ml); dilute the 60 ml. with water up to a
total of 500 ml. to make the working toner.  I have been happy with the
results.  The stock solutions of the separate chemicals should last a long
time (at least a year).  I store the NaOH solution in glass (very
corrosive!!!). The mixed working toner apapparently has a short life and
should be discarded after one session.  As a final note, when you get a lot
of NaOH on board(ie.e, for cooler prints), there a chance of a scum forming
on the surface of the print.  I always dip the print through my stop
solution after toning but before rinsing to prevent this scum formation.

This has worked for me and, I recall, is consistent with the recipe in
Rudman's printing book.

Sam