[alt-photo] Re: SALT & COT 320

[BOB KISS]

DEAR CHRIS & LORIS,
	Thanks for your replies.  I also got a reply from Christopher James
who said that the salt process needed a healthy amount of organic material
(gelatin in this case) to be active or you will get very flat, pale prints.
He said that COT didn't have enough.  So I will have to salt the paper ahead
of time and tell them about it at the lecture/demo.  Easy to describe and
do.  I can bring the already salted paper and do the two silver nitrate
coatings Christopher recommended, expose, and process.  Should be able to be
done in 4 hours.  
	Thanks!
		CHEERS!
			BOB

-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
Christina Anderson
Sent: Friday, April 09, 2010 11:21 AM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: SALT & COT 320

Bob,
Your previous message never came through...

I have not used Cot 320 so I may be speaking out of turn, but I have used
Arches Platine which if I am not mistaken is similar.
But where there was no coating of gelatine (e.g. at the edge of the paper)
the image was pale and blah. So my guess is, you'll get a print but not a
very good one, but it will serve the purpose of showing the process.

Is it possible to mix a starch paste and use that as your brush coating (it
won't gel at room temp)?  Because starch provides a necessary organic as
well, and keeps the silver nitrate on the surface of the paper.  But in my
notes starch is not the same as using gelatine or albumen, both of which aid
in the reduction of the silver chloride.  Alberto can explain chemically why
this may be the case.

This demonstration request reminds me of one I have for this summer--to do a
gum demo in 2 hours for a community of people.  Now that part is no
problem--I've done a gum demo in that amount of time (in fact Sandy King was
at it in Clemson) with tricolor gum, having already prepared a piece of
paper with one layer of blue, and one also with one layer of blue/yellow so
I only have to do one coat of magenta and get one done and so on and so
forth.  But at this workshop, I was asked to make it hands on for the
community!  We couldn't figure out how that could happen in two hours so we
decided not to do it....and certainly I wasn't asked to size the paper at
the demo, wow.  
Chris

Christina Z. Anderson
christinaZanderson.com

On Apr 9, 2010, at 7:55 AM, BOB KISS wrote:

> DEAR LIST,
> 	I posted this yesterday but didn't receive any replies...maybe it
> didn't go though so here it is again...
>             Hi from Barbados!  A quick question.
>             The local Museum has asked me to give a lecture on some of the
> processes used to make some 19th century prints in their collection.  They
> wanted me to demonstrate one of the processes so I opted for a salt print.

> The trick is that they want me to do everything at the demo except mix the
> solutions (which I will need to do ahead of time): i.e., coat the salt
soln,
> dry, coat the silver soln, dry, expose, salt wash bath, wash, tone, fix,
> wash.  That means that I wouldn't be able to salt the paper ahead of time.

>       The formulae always use gelatin in the salt solution.  If I use COT
> 320, a well gelatin sized paper, might I get away without putting gelatin
in
> the salt solution?  This would allow me to mix it a day or two before the
> demo without the gelatin hardening.
>       Thanks in advance for your suggestions.
>                               CHEERS!
>                                           BOB
> 
>  Please check my website: http://www.bobkiss.com/  
> 
> "Live as if you are going to die tomorrow.  Learn as if you are going to
> live forever".  Mahatma Gandhi
> 
> _______________________________________________
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