OK, so after developing those old reversal films and then getting distracted for weeks, I finally got back to the Plus-X that started this thread (and my first supply of Adox Silvermax has finally arrived, so I want to get the old films done before that takes all of my attention).
So, after a test strip cut from the leader of the Plus-X, I gave it 15 minutes in HC-110 dilution B... and the film was totally fogged 🙁
Next on to the old 120 roll of Verichrome Pan. In the changing bag, I found that about half the film had become firmly bonded to the backing paper and it was impossible to separate the layers - and with the paper on it wouldn't load into the spiral. So I cut off the part that was free and developed that... and it was totally fogged 🙁
Last one was my old roll of Kodachrome 64, and I guessed at 10 minutes in dil B... and the results look good 🙂
I have a film of negatives with good-looking contrast (on a yellow film background, but that's no problem for scanning). One of the sites I read said that the black anti-halation layer on the back needed to be removed with sodium carbonate, but that wasn't necessary as it had turned into a layer of slime and wiped off easily in plain water.
On first inspection I don't recognize the subject matter at all, but it's hanging up to dry now and I'll scan it tomorrow and should find out then!
