Quote Originally Posted by fotoobscura View Post
Bill was right. I fixed for an additional 3 minutes and the images cleared. Now, why literally fresh fixer (as in, a few days mixed) couldn't fix a roll in three or four minutes escapes me. This has been my process for at least 10-15 years with no problems. Clearly I made a mistake somewhere in mixing the fixer. I guess.
Two possibilities to consider:

1) did you inadvertently mix it to paper strength dilution, rather than film strength dilution?;
2) did you "double-dilute" - i.e. did you inadvertently take working solution fixer (e.g. at 1 + 4) and further dilute that (e.g. at 1 + 4)?

Creative slip ups are my speciality