From: Liam Lawless (liam.lawless@blueyonder.co.uk)
Date: 09/04/02-11:17:54 AM Z
Hi Ed,
But sounds like Sandy's problem is different! Sodium chloride produces a
more intense blue-purple colour (depending on paper, to some extent), and
higher D-max. With amm. chloride, it's usually red-purple. But with sod.
chloride, "spontaneous darkening" occurs rapidly, giving foggy results
unless the salting solution contains enough citric acid... which makes the
colour redder!
When prints dry, the differences are much less than when wet. With Rochelle
salt added, I used to get a beautiful chestnut brown (though less impressive
on a dry print), and gold toning this gave a neutral black. If you're that
way inclined, you could probably make salt look like platinum!
Liam
-----Original Message-----
From: Ed Buffaloe [mailto:EdBuffaloe@UnblinkingEye.Com]
Sent: 04 September 2002 11:42
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Salted Paper
Liam,
You have described exactly the problem I had recently. Interestingly
enough, my first print came out fine. Subsequent prints looked good going
into the final wash, but ended up with a greyish stain. I hate to use
distilled water for every first rinse, but I will if I have to. The boiling
and cooling sounds promising.
I note that most books recommend ammonium chloride. Does sodium
chloride produce a different color? What about the rochelle salt?
Ed
> Sandy,
>
> Long time since I've done salt, but think I recognise the problem. With
me,
> general staining - within the image area, not margins - occurred during
the
> final wash. Greyish-brown colour, and could get really bad with a long
wash
> (toning didn't avoid it). I believe poor quality tap water (in the first
> wash) is to blame; Terry King had the problem even worse than me and said
> his prints stained as soon as his prints hit the first wash.
>
> I've also had the problem with another silver process. It doesn't strike
in
> all locations, but the cure is to give an initial rinse in
> distilled/deionised for 2-3 minutes, and then continue the first wash in
tap
> water for as long as required. I don't think it's chlorides in the water
> that are responsible because something else that worked was to give a
first
> rinse in boiled and cooled tap water, which seems to suggest that
dissolved
> oxygen might be the reason.
>
> As for directions for salt, I don't think you need them except to point
out
> (as you're probably aware) that you can use many different salting
> solutions. The commonest one (in all the textbooks) is, I think, sod.
> chloride, citric acid and sod. citrate, but I got what I considered much
> better results with my own, of, if I remember, sod. chloride and Rochelle
> salt. The paper also makes a difference; on heavily buffered papers like
> some of the Arches, you'll get a proportion of silver carbonate forming
when
> you silver, and this gives the image colour a pronounced red shift.
You'll
> also see this effect with VDB.
>
> Hope we're talking about the same thing & that this is some use.
>
>
>
> Liam
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