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From: groundglass@delphi.com (Michael R. Coble)
Date: Thu, 12 Sep 1996 21:06:17 -0400
Subject: Re: Van Dyke Help Sought
>SCHRAMMR@WLSVAX.WVNET.EDU wrote:
>>
>> George,
>>
>> Exactly how are you coating the paper?
>>
>> Bob Schramm
>
> I keep the Van Dyke sensitizer in the refrigerator in a blackened
> bottle. When ready to coat, I shake it up and pour an inch or so into
> a glass container. I normally wait for the sensitizer to come to room
> temperature. I dip a four-inch foam brush into the container and
> allow it to become saturated with the solution. I then push the brush
> against the side of the container until I've squeezed as much as
> possible from the brush. I then lay even strokes across the paper,
> slightly overlapping. I turn the paper 180 degrees, and go through
> the same procedure. I then turn the paper 90 degrees and repeat. I
> finally turn the paper 180 degrees and repeat, trying to ensure that
> there are no "puddles." I allow the paper to dry in the dark.
>
> george
In my experiences the Humidity level tends to have a effect on the
sensitivity of the emulsion .I've tried to standardize the drying
process with a drying box and a controllable light source for printing.
I don't know if this might be of help to you.
Michael Coble