[pure-silver] Re: metric version of E-72 (ascorbate version of D-72)
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 1 Nov 2005 16:12:16 -0500
Paper developers are sometimes made up without bromide with the intention that
some bromide will be added to the working solution. I suspect this may be the
case with Gene's formula. Paper developers need bromide. The amount in the
E-72 formula is the same as that for D-72.
Jerry
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of John Black
Sent: Tuesday, November 01, 2005 3:55 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: metric version of E-72 (ascorbate version of D-72)
E-72
Distilled water (50° C) ................ 750 ml
Sodium sulfite (anhy) .................. 45.0 g
Ascorbic acid .......................... 19.0 g
Phenidone .............................. 0.3 g
Sodium carbonate (mono) ................ 90.0 g
Potassium bromide ...................... 1.9 g
Distilled water to make ................ 1.0 l
Chris Patton came up with this ascorbate version of D-72
Thank you sir. I noticed that your formula contains bromide and Gene's
doesn't. I realize this is an antifogging agent but how much difference would
it make if left out?
JB
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