KODAK NON-HARDENING ACID FIXING BATH F-24

600 ml Water (125F or 45C)
240 g  Sodium Thiosulfate
10 g  Sodium Sulfite
25 g  Sodium Bisulfite
Top up to one litre water

Fixing Time: Twice the time it takes to clear a plate, usually 2 to 4 minutes.

Temperature:  20C              Agitation:  Intermittent

Shelf life: This stock solution lasts practically indefinitely, dump it when it starts to take longer than 5 minutes to clear a plate

Source: Photo Lab Index, Lifetime Edition, Morgan and Morgan, Inc., Dobbs Ferry, New York.