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

[Productions]

For photographic purposes, they are close enough to use them gram for 
gram. In fact, I understand that most sodium bisulphite sold in the US 
is actually metabisulphite.
John

On 11/15/2010 9:13 PM, Ken Sinclair wrote:
> 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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