From: Judy Seigel (jseigel@panix.com)
Date: 09/03/00-10:53:02 AM Z
On Sun, 3 Sep 2000, Robert W. Schramm wrote:
> What do you mean by murkey? Is it cloudy or sort of white? If so,
> it may have been contaminated with chlorid and may not be any good.
> Or does it have particles in it? If so, go ahead and filter it. If
> you get a clear solution it may be OK. Test by putting a few drops on white
> paper. Let it dry and expose it to bright light. If it darkens
> it is likly to be OK.
>
I've used VDB solution up to 3 years old, when it was indeed "murky," that
is, had lost clarity, turned cloudy, and gotten black flecks throughout.
My experience was that it printed just fine -- and I would suggest NOT
filtering. That is, the black flecks seemed to go back into solution
during coating (I saw none on the paper), and, since odds are they contain
silver, why filter them out? (In fact it's possible you could filter &
nothing would be removed.) Odds are, however, that test strips made when
emulsion was fresh no longer apply -- could be slower & and "curve" a bit
changed...
Judy
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