Archived posting to the Leica Users Group, 2002/06/23

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Subject: Re: [Leica] Re: Re: OT - Sodium Thiosulphate
From: D Khong <>
Date: Sun, 23 Jun 2002 18:54:25 +0800
References: <> <> <> <> <> <>



Dan K.

At 06:07 PM 6/22/02 -0700, you wrote:
>There are two kinds of "Hypo", anhydrous and, more commonly, crystalline. 
>Use 64% of the anhydrous salt as a substitute for the crystalline form. 
>The crystalline form is endothermic and will cool the water dramatically 
>when mixing. Always start with water at 90F/32C when mixing the 
>crystalline form.
>Page 38, Darkroom Cookbook.

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