Quote Originally Posted by holmburgers View Post
If your fixed-out FB paper was treated in a hardening fixer...[snip]...It therefore might be interesting to observe what happens with photo-paper that was fixed out in a non-hardening fixer.
The paper I used was fixed-out in a non-hardening fixer (Ilford Rapid Fix). The stain that developed was very faint (but noticeable) compared to your example and my first test, and took much longer to form.