Strange marks on re-washed negative that won’t come out?

[Arg6442]

Hey everyone,

I was wrapping up a printing session the other day and very clumsily got a few drops of water on an important 5x7 negative. Mildly annoyed, I put the sheet back through a wash cycle and hung it up to dry without much more thought. The next day, I took it down and saw that the base side of the negative was covered on one half with very strange smudges/marks/scuffs(?) that looked like drying marks. I set the negative through the wash again (20 minutes, room temperature water, patterson 12x16 rapid print washer, then a dunk in distilled water with photo flo — I hadn’t used photoflo the 2 previous washes and almost never use it when developing) and this morning, the same marks are there on the negative. I grabbed some isopropyl alcohol and a q-tip to try cleaning them off but they seem to just be stuck there. Any idea what it could be and how I should try to clean them off? I’m not sure that it’ll affect printing but I am a bit concerned.

Thanks!

https://uploads.tapatalk-cdn.com/20201112/c0682f50d492030d08d87090e55e223c.jpg
https://uploads.tapatalk-cdn.com/20201112/650bdd43410114051ce645e3849492c1.jpg


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[jim_jm]

Was your Photo-Flo working solution a fresh mix? I've seen residue floating in working solution that was a month or more old.
I think the age of the concentrate itself should not be an issue, as I have a bottle that's about ten years old and don't have any problems yet. I mix it at about 1:300 with distilled water.

[Arg6442]

Was your Photo-Flo working solution a fresh mix? I've seen residue floating in working solution that was a month or more old.
I think the age of the concentrate itself should not be an issue, as I have a bottle that's about ten years old and don't have any problems yet. I mix it at about 1:300 with distilled water.

Yep, it was fresh, but the marks showed up before I used photo-flo.


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[Doremus Scudder]

Possibly mineral deposits from hard water. Try a prolonged soak in acetic-acid stop followed by a 5-minute wash and then your distilled water/Photo Flo.

Doremus

[Jerry Bodine]

You could try using PEC-12 cleaner with PEC PADs to see if it'd clean the marks. It's amazing stuff.

https://www.freestylephoto.biz/2222-PEC-12-Photographic-Emulsion-Cleaner-Bottle-with-Dropper-Tip-2-oz.
https://www.freestylephoto.biz/2214-PEC-PAD-4-in.-x-4-in.-Sheets-100-Pack