DSF

Anyone know if CPM 6.1 or 6.2 has a shelf life.

and while I'm asking what about other TMT light/dark papers.

hi
CPM 6.1 is already quite old If stored well it should last several decades, we have old stock from the last century:eek: (CPM6.0) that still works. Current production will keep.
TTC ages well and stock that is old performs well, again a decade or two should be fine if stored well.
In both cases do not get damp that is the problem area.
The waterslide (DCT) paper hardens with age and you should not keep too long , 3 years maybe depending on storage.
OBM came in various flavours
OBM 5.2 for oiled laser printers / copiers only. Still works must be 10 years old and more. But if you find some do NOT put in current printers, It will jam in oil less printers.
OBM 5.5 for oil less laser printers / copiers still works but again 10 years old.
Current versions
OBM 5.6 for all types of lasers and copiers current but old stock is fine.
OBM 5.3 for OKI laser printers not old enough to tell but expected to be a decade or so

All the usual caveats keep it nice in good conditions not in a swamp or oven!

Cheers
Alan

Thanks Alan great bit of info for the archives.

I recently came across some CPM 10 years old and still works fine, so once again, Alan is right!