However there are other exceptions and films from some smaller manufaturers like Foma and particularly EFKE have less hardening. EFKE films will reticulate and even slide off the base.
Ian
As Ian points out there are a few older formulation films that are available. Such films as these might benefit from the use of a chrome alum stop bath. Chrome alum (potassium chromium sulfate) does a better job of hardening an emulsion than ordinary alum found in hardening fixers This chemical contains chromium (III) and not the very dangerous chromium (VI). A 3% solution is used for 2-5 minutes after the developer and before the fixer.
