Archived posting to the Leica Users Group, 2002/02/27

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Subject: Re: [Leica] Really simple chemistry question D76
From: Bryan Caldwell <bcaldwell51@earthlink.net>
Date: Wed, 27 Feb 2002 18:56:08 -0800

Do NOT divide the powder. Kodak has always cautioned against this. There are
different 'ingredients' in the powder and if you divide the package there's
no way you can be sure that all the ingredients are evenly distributed.

Bryan 




On 2/28/02 6:31 AM, "Robin Barnsley" <Robin.Barnsley@jet.uk> wrote:

> Jeff,
> 
> You could divide the powder, and mix what you need. I have done this, as the
> shelf life of the powder is much longer.
> 
> IIRC some developer constituents are weakly soluble and may precipitate out
> in storage.
> 
> Regards, Robin Barnsley.
> 
> -----Original Message-----
> From: Jeff Williams [mailto:jeffwill_nz@yahoo.fr]
> Sent: 28 February 2002 12:52
> To: leica-users@mejac.palo-alto.ca.us
> Subject: [Leica] Really simple chemistry question D76
> 
> 
> My pack of D-76 powder says "makes 5 litres". I only
> have a 2 litre airtight bottle. Can I disolve it in 2
> litres and then dilute it 1:4 instead of the 1:1 if I
> had made it up to the correct volume?
> Don't laugh, it's a genuine question!
> Regards
> Jeff le kiwi
> 
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