Re: Van Dyke process permanence

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From: Judy Seigel (jseigel@panix.com)
Date: 03/20/03-11:53:12 PM Z


On Thu, 20 Mar 2003, James Young wrote:

> This question seems to come up on the list a lot and continues to
> make me wonder what to do.
> I've been using the bostick & sullivan van dyke solution and
> following the supplied directions, which recommend fixing in weak
> sodium thiosulfate (10 grm per liter) for 15-20 seconds, although I
> tend to do closer to a 15 grams per liter solution for 1-2
> minutes.The direction recommend washing for 5 minutes, but I wash for
> 30-40 minutes. I have tried permawashing them and washing for longer
> but the permawash yellowed the print a bit, and the longer washing
> times degraded the image on the paper. I haven't tried toning yet but
> may consider that soon.

Have you tried a residual hypo test? For instance HT2 is easily made,
with clear instructions in David Vestal's text... (& current Post-Factory
for that matter). We found in class that 50 minutes was OK on average.

J.

> By the way I have had very good luck printing on a paper caller ANW
> drawing and Framing paper, with both van dyke and Cyanotype. I get it
> in 20 yard by 60" rolls, though it is available in sheets too. I've
> found the roll material works a little better. I've been doing very
> large cirkut negatives up to 10" x 96" and 16" by 64" Plus inch
> sizes, and find the biggest problem is getting an even coating over
> such large sizes. I like van dyke because it's fairly forgiving and
> simple, and I can't fit many trays at these large sizes.
>
> I'm curious what others have experienced.
> Jamie Young in Madison, WI
>


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