RE: VDB

Add me to the list. I usually filter the Vandyke solution (using paper
coffee filter) the day after mixing it. Even doing so, the emulsion
shows further precipitation later (1 week after mixing, about 1/4 amount
compared to the first precipitation). I filter it too. Much later, when
silver plating occurs inside the bottle, I throw away the old emulsion
and mix new sensitizer.

BTW, I never managed to reach good Dmax with Vandyke by just one coat. I
always double coat it. What is your experience? Do you get good Dmax
with one layer Vandyke? If so, I will start to think I'm doing something
wrong mixing it (I use directions given in Wynn White's article @
unblinkingeye.com) - or my concept for good Dmax is a little bir
exaggerated...

Regards,
Loris.

-----Original Message-----
From: Fabiano Busdraghi [mailto:fabusdr@yahoo.it]
Sent: 13 Ekim 2005 Perşembe 10:43
To: alt-photo-process-l@sask.usask.ca
Subject: Re: VDB

hi,
I also use the liquid on top. Mixing the solution just before coating I
had a grainy and uneven result.
ciao
fabiano

--- "Weber, Scott" <sweber@mail.barry.edu> ha scritto:

> Thanks for all of the replies, I think I isolated the problem. I was
> storing the coated paper under plastic containers that were not light
> tight. The paper was exposed to small doses of florescent light for
> several hours. I do
> have another question about the precipitate that forms in the
solution.
> Should I mix that into a suspension before coating or is it best to
let it
> settle and just use the liquid on top?
> Thanks,
>
> Scott B. Weber
> Associate Professor of Photography
> Department of Fine Arts
> Barry University
> 11300 NE 2nd Avenue
> Miami Shores, Florida 33161
> (305) 899 4922
>
> -----Original Message-----
> From: RHobbs3@aol.com [mailto:RHobbs3@aol.com]
> Sent: Tuesday, October 11, 2005 8:26 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: (no subject)
>
> I have used very old VDB solution succesfully, although little flakes
> of silver seem to precipitate out of the solution.
>
> Rob
>
>
>
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>

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Received on Thu Oct 13 01:55:45 2005