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Old 13th September 2020, 03:26 PM
Nat Polton Nat Polton is offline
Join Date: Oct 2019
Posts: 290

Mike could be on the right track there.
In my previous house I started to get the occasional black spot on the negatives.
After examining the negs. with a watch makers eyeglass I found tiny bits of sand stuck to the emulsion side.
I bought a Paterson water filter to use on the cold water tap.
The amount of sand and tiny rust particles caught by the stainless steel gauze was amazing.
This was not old plumbing but a brand new estate.
I shall dig out that old filter and start using it again.
It will all be over by Christmas.
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