[pure-silver] Re: D-76 and variations
- From: "John Black" <jblack@xxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Mon, 28 Nov 2005 12:50:54 -0500
>
>
> The original D-76 formula and Ilford's published formula
> for ID-11 are:
>
> Water (at 125F or 52C) 750.0 ml
> Metol 2.0 grams
> Sodium Sulfite, dessicated 100.0 grams
> Hydroquinone 5.0 grams
> Borax, granulated 2.0 grams
> Water to make 1.0 liter
>
Seems like I remember the OLD original prewar formula for D76 was
accelerated with Na Carbonate and had a problem with increasing activity
with aging in solution that was traced to a rise in pH mediated by the
carbonate. All of which was remedied by switching to borate
accelerators/buffers. Am I dreaming or was that the case many years ago?
JB
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
