[pure-silver] Re: Weird Film Issue

  • From: Bob Younger <ryounger@xxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Mon, 7 May 2012 06:56:09 -0700

It's almost undoubtedly hard water; and not using foto-flo type products
will only exacerbate the problem. I do a final rinse in distilled water
with a couple of drops in a liter. Rinse and agitate for a couple of
minutes. I use 8x10 film and never wipe. But for years now I've never had a
single streak or spot on my films. And I have occasionally used roll film
with the same process and similar results. This is a lesson I learned like
you have. If your water is exceptionally hard (and you can have it tested),
I've on occasion used one of the on-faucet filters (like Brita) for the
last few minutes of washing; then treat as above.
I've found that hard water stains are really hard to get off the film.
Bob Younger

On Mon, May 7, 2012 at 6:29 AM, Myron Gochnauer <goch@xxxxxx> wrote:

>  Discovered this morning, the mysterious film and line of dried "beads"
> is there on 3 of the 5 rolls - even worse than before!  Random dried liquid
> splashes and splotches all down the length of the rolls, a total mess.  The
> only saving grace is that they are on the non-emulsion side.
> In the past I have had similar problems in a town with very hard water.
>  Rinsing the film in distilled water (20-25 degree C) plus wetting agent,
> and then *gently* using my 2nd and 3rd fingers (index finger and the one
> next to it) as a squeegee solved the problem.  Occasionally it took a very
> slight rubbing with my thumb to dislodge with felt like grit on the
> non-emulsion side.  I have never scratched film when running it gently
> through my (clean, wet) fingers.
> The problem *may* be worse during the spring if you live in a climate with
> winter freezing.  When the ground thaws in the spring we have sometimes had
> slightly discoloured water.  For a few years I could not make black and
> white prints for about 3 weeks every year in April or May because of
> permanent chemical staining of the emulsion.  Eventually the city
> determined that when they flushed out the water mains in the spring it
> stirred up sediment in a water line dead end near my house. They removed
> the dead end and the problem disappeared.
> Myron
> Fredericton, NB, Canada

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