Paul, No, seeing metal at the bottom of
the bottle is NOT a good thing or to be expected. Palladium is not near a
saturated solution as most printers use it an even less so for solution that
B&S sells compared to some formulas call for. There should NOT be any
settled stuff in a PD bottle. In the case of PT, it can come out of solution as
a metal with excessive heating or can be present through poor quality control.
It can also be there because it can come out of solution but it is MUCH more
likely to crystallize in to large ruby red chunks that are 5 sided (if I recall
correctly) being formed at the bottom of the bottle. These can and should be
able to be put back into solution with slight heating. 100F
You might see the salt in the PD solution
or a complex thereof. Now it can be added to saturation, but it is different
than just the PdCl2. If you see very fine streaks in your prints, they may be
caused by metal particle being pulled across the paper. Black specks can also
be a speck of metal.
40% is a good price.
Filter them if you run across problems.
Sent: Sunday, November 16, 2008
Subject: Re: buying previously
used pt/pd chemistry
As far as I know, the solutions are
from B&S, purchased in liquid form and no heating was done to them. The
price I paid amounts to 40% off current retail, so I thought it was worth it...
Regarding sediment in the bottles: I
thought that the pt and pd solutions are near saturation and that it's common
to see the metal at the bottom of the bottle, hence the admonition to shake 'em
up the night before and let them settle. No?
----- Original Message -----
November 15, 2008 9:01 PM
Subject: RE: buying
previously used pt/pd chemistry
The solutions themselves
can last quite well. However, not everyone uses chemicals in the same way. So,
several things to ask the seller. Where did they come from? Did they buy them
as a powder or liquid? Did they routinely heat them? If so, how? Over heating
PT solutions can cause some problems.
If you and the seller use
them as delivered and they work a lot like you do, you’ll be in good
standing to judge for yourself. I have had a problem with this in the past, but
you never know. I did have one bottle of PD during a workshop turned into a
PD/Ferric solution by a slightly confused student.
Look for sediment in the
bottles. Are you in the same town or is this a buy sight un seen?
From: Neal Wilson
Sent: Friday, November 14, 2008
Subject: RE: buying previously
used pt/pd chemistry
I've done this and it's always been just fine. The
Pt/Pd/Na2 seem to be fairly bulletproof. It's not storage that is an issue, but
Date: Fri, 14 Nov 2008 08:08:58 -0800
Subject: buying previously used pt/pd chemistry
I know someone who is getting out of
pt/pd printing and selling a few solutions (pt, pd, na2) at good prices...any
danger in buying them besides the uusual caveats about how they were stored?