RE: Salt Prints: Potassium Citrate vs. Sodium Cloride or Citrate?

No, the different salts don't all do the same. If I remember right (it's
been a while) sodium chloride gives greater density and more purple colour;
with amm. chloride it's redder. Citrate on its own or with a chloride makes
the colour pinker and lowers D-max, but lowers fog and inhibits "spontaneous
darkening".

Try a few. You can also use other salts, tartrates for example (which give
a more neutral colour). Rochelle salt (sod. pot. tartrate) is a good one;
if you have a recipe that works OK, try halving the amount of chloride it
contains and add the same amount of Rochelle.

Liam

-----Original Message-----
From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
Sent: 14 November 2005 02:45
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Salt Prints: Potassium Citrate vs. Sodium Cloride or
Citrate?

Apparently my "h" key is on strike, should read chloride...my bad.

----- Original Message -----
From: "Michael Koch-Schulte" <mkochsch@shaw.ca>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, November 13, 2005 8:01 PM
Subject: Salt Prints: Potassium Citrate vs. Sodium Cloride or Citrate?

> Can someone explain the differences, if any, between using potassium
citrate
> as opposed to just sodium cloride or sodium citrate in the salt printing
> process? Why does Barnier swear by potassium citrate? Is it newer and
better
> i.e. was potassium citrate simply just not around in the 1840s? Thx.
>
> ~m
> p.s. what about ammonium chloride? A salt, is a salt, is a salt? No!?
>
Received on Sun Nov 13 22:35:23 2005