Re: Making Albumen Solution with Kodak Indicator Stop

From: Richard Knoppow ^lt;>
Date: 11/28/05-09:39:03 AM Z
Message-id: <001b01c5f431$df308140$8ffd5142@VALUED20606295>

----- Original Message -----
From: "Michael Koch-Schulte" <>
To: <>
Sent: Sunday, November 27, 2005 11:54 PM
Subject: Making Albumen Solution with Kodak Indicator Stop

> Not having immediate access to any glacial acetic acid I
> substituted Kodak
> Indicator Stop instead which is a 28 per cent solution
> instead of 99
> percent. I used 5 ml in a 500 ml solution of egg albumen.
> I encountered no
> problems with staining from the indicator or dyes used in
> the stop's stock
> solution. I think because the amount is so small the
> effects are negligible.
> The only ill effects were my eyes popping out of my head
> when I saw how long
> the tonal scale was for albumen -- 2.55. One question: can
> someone explain
> to me the purpose of acidifying the albumen solution with
> acetic acid?
> ~m
> p.s. A beneficial spin-off of making albumen is that these
> days I make a
> mean hollandaise sauce ...
  Beware that Kodak also makes indicator stop bath which is
about 50% Acetic rather than 28%.

Richard Knoppow
Los Angeles, CA, USA 
Received on Mon Nov 28 09:40:35 2005

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