Mix the two solutions, A and B, in the proportions 10:100, (10 mls solution to 100 mls water) but keep them seperate - don't mix them! You can use these at 20 degrees C.
Pour solution A into the tank and agitate for the first minute, then for ten seconds every minute for a total time of five minutes. Pour off the solution and retain - it can be re-used for up to four hours or so. Without any wash pour in solution B and agitate for ten seconds and leave to stand for the rest of the time - 5minutes. At the end of this time pour off the liquid and retain for future use, and stop (use a water wash) and fix the film.
As always, you might want to refine your times for fine-tuning, but these times will give very printable negatives.
This technique is very useful with negatives of high contrast; the highlights are held back beautifully whilst the shadows build...