Re: Effect of Tween 20

From: christine shepherd ^lt;[email protected]>
Date: 10/17/05-11:17:52 AM Z
Message-id: <>

hi michael,

can't really say as i've only used the formula with tween already added, but i will note that yes, it seems to take more solution to evenly coat that you would think. the variable i have noticed that helps the most is proper ambient humidity when you coat. if it is lower than 40%, i've had a rough time.


You have noticed that everything an Indian does is in a circle, and that is because the Power of the World always works in circles, and everything tries to be round.....The Sky is round, and I have heard that the Earth is round like a ball, and so are all the stars. The Wind, in its greatest power, whirls. Birds make their nest in circles, for theirs is the same religion as ours....
Even the seasons form a great circle in their changing, and always come back again to where they were. The life of a man is a circle from childhood to childhood, and so it is in everything where power moves.

~Black Elk

---------- Original Message ----------------------------------
From: Michael Koch-Schulte <>
Date: Sun, 16 Oct 2005 20:44:38 -0500

>Does the addition of Tween 20 cause an emulsion to really absorb quickly
>into the paper? The reason I'm asking is that I cooked up a batch of
>Argyrotype emulsion last night and it seems that I require double the
>emulsion to coat the same area as compared to say VDB or Cyano. I added
>about .20 ml per 100 ml of solution during the preparation as suggested by
>Ware's formula. I'm wondering if I should have heeded the advice to add it
>prior to coating. What's the consensus about the addition of Tween 20 and
>Argyrotype? Thx.
Received on Mon Oct 17 11:22:58 2005

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