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@@ -432,6 +432,29 @@
 can process normally if needed.
 
 
+
+## Update 6-3-2021: Very Old Film
+
+Since this was first written, I've done a fair bit of testing using low
+agitation with very old, expired film.  So far, I've discovered
+several things worth noting:
+
+
+* Old Kodak Tri-X (expired 7/1993) takes semistand processing
+  in Pyrocat-HD perfectly, shows full speed, and has no noteable fog.
+
+* Very old Kodak Plus-X (expired 11/1974) is another matter.  It shows
+  horrible bromide drag at the hanger suspension locations - even
+  using the most minimal support.
+
+  Whether this is the nature of this film or its age isn't clear.  I
+  have to do further testing with other Plus-X vintages.  What is
+  clear is that this is definitely induced by the Pyrocat-HD.  When I
+  took the same film/scene and semistand processed it in D-23 1:1 for
+  60 minutes, I got perfect negatives that actually showed slightly
+  better film speed than the Pyrocat-HD negs.
+
+
 ## Copyright And Use
 
 All content here is Copyright (c) 2021 TundraWare Inc., Des Plaines, IL USA