Chris, I have been using TF4 since it came out with no stain problems. TF5 is similar without the stabilizer/buffer which helps maintain PH if using an acidic stop. Yes, use a wash aid for 10 min after toning prints. My final wash is 30 to 40 when processing fiber prints after the toning and wash aid step.
Follow Ilford's recommendations to rinse prints for 5 min before and after toning. Only then move prints to the final wash step.
Warning: for optimum permanence limit fix capacity to (10) 8x10 prints in 1L of fix if using a one tray fix line. The reason is silver buildup in the fix.
Testing is the only sure way to know.
Last edited by Richard Jepsen; 03-10-2013 at 02:06 PM. Click to view previous post history.