[alt-photo] Re: assitance needed Pyrocat-HD

[Don Sweet]

Hi Ken

I don't know, but these chaps do

http://photo.net/large-format-photography-forum/0037VE

Don Sweet

----- Original Message ----- 
From: "Ken Sinclair" <photo1 at telusplanet.net>
To: "The alternative photographic processes mailing list"
<alt-photo-process-list at lists.altphotolist.org>
Sent: Tuesday, November 16, 2010 3:13 PM
Subject: [alt-photo] assitance needed Pyrocat-HD


> It has been too many years for this aging brain to remember much
> about college chemistry
> but here goes...
>
> I just ran out of enough  Sodium metabisulphite for making up a batch
> of Pyrocat-HD.
>
> I have more than an adequate supply of Sodium bisulphite...
> therefor,  my question is....
>
> How much Sodium bisulphite will be required to provide the
> equivalence of 2 g of
> Sodium metabisulphite for making up 200 ml of Pyrocat-HD solution A
>
> Any and all chemical assistance on getting this made up this evening
> will be more than appreciated
>
>
> Ken
>
> Quando omni flunkus moritati (R. Green)
>
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