If you process your own black and white film, you may have experienced the “yellow negative problem.” It happened to me for the first time today. Let me just say, it’s not the end of the world.
There are two possible causes: 1) not enough time in the fixer and 2) over-diluted fixer. Regardless of the cause, simply refix your negative for a few more minutes and the yellow will clear right up. I soaked my jaundiced negative in fixer for about 10 minutes just to make sure. Oh, I have to mention my negative had been dry for about two hours before the refixing.