I recently spent several sessions in the darkroom reprinting an older negative from which I wanted to get a nice, subtle sepia tone. I used Ilford MGIV, developed in Ilford Multigrade developer, bleached and toned in scratch-mixed bleach and thiourea toner.
My finished prints seemed to take on a persistent olive hue that I had a terrible time with, since I wanted a nice brown with no greenish cast. I finally selenium toned the prints after the sepia, which did kill the green to some extent.
Older prints that exhibit the nice brown tone that I was looking for were developed in Ilford PQ developer. I recently switched to Multigrade developer and I am wondering if that is what introduced the olive cast. I don't have any PQ left with which to make comparision prints, and I am wondering if anyone can offer any advice.