Re: Liver of sulfur?

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, November 01, 2003 2:43 PM
Subject: Re: Liver of sulfur?

> From: Richard Knoppow <dickburk@ix.netcom.com>
> Subject: Re: Liver of sulfur?
> Date: Sat, 01 Nov 2003 14:02:51 -0800
>
> > KBT contains both a substantial amount of sodium
> > carbonate, according to the MSDS about half the amount
of
> > the Polysulfide, plus a small amount of Sodium
Hydroxide.
>
> You might have missed the point that "liver of sulfur" is
a mixture of
> polysulfide, carbonate, hydroxide, sulfate, and probably
other
> things. I explained this in the previous post of this
thread. I
> provided the information that KBT is said to be water plus
liver of
> sulfur. This is equivalent to water plus polysulfide,
carbonate,
> hydroxide, etc., which the MSDS probably refers to. Liver
of sulfur
> when dissolved in water is already very alkaline. But
degree of alkali
> may vary from batch to batch of liver of sulfur
production, thus there
> may be a need to adjust for this during preparation of the
toner
> stock. If you read IPI report there are some details of
the issues
> they faced due to this production inconsistency of liver
of sulfur.
>
> --
> Ryuji Suzuki
    While Polysulfide has carbonate in it I think if no
additional carbonate was added it would be on the MSDS. MSDS
usually don't show any more than they have to.
    Also, there is the carbonate in T-8 suggesting that
there probably is in KBT also.

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@ix.netcom.com