I have no hard (or
scientific evidence) but I have seen that fragment of proofs of my prints or
misprints, which I kept over years, start to show defects and damage. So I
related these problems to bad clearing. EDTA is a chelating agent. I have read
that it more or less encapsulates metal molecules and makes them better soluble
in water. Even people are treated with it intravenously to wash out metals from
their body. (EDTA might probably the only chemical in alt-photography which
benefits to our health).
So, my reasoning is
simple. Over time encapsulated metal particles may come loose from the paper fibres.
I do recall that Tyranno King mentioned something about EDTA to some months
Van: Sandy King
Verzonden: donderdag 9 november
Onderwerp: RE: Mike Ware's POP
Any idea as to the cause of this?
At 9:22 AM +0100 11/9/06, Witho Worms wrote:
Be sure to do a very good final wash when using EDTA for clearing. If the
wash is not complete you will face that palladium will come off the paper
during time (one or two years).
Van: Sandy King
Verzonden: donderdag 9 november 2006 7:41
Onderwerp: RE: Mike Ware's POP Pt./Pd. Pt
Will get the lithium chloride. Your advice has
been outstanding so far, and I am very pleased
with the results.
Just wondering, have you done any work with AFO
and kallitype? The clearing of prints in
Disodium EDTA made with FAO and Ammonium
Tetrachloropalladate (II) is so quick and easy I
am wondering if the procedure can be adapted to
At 8:15 AM +0200 11/9/06, Loris Medici wrote:
>Good news Sandy. I'm glad that you like the alternative sensitizer. Do
>yourself a favor and also purchase some (cheap, B&S has it) Lithium
>Chloride - to make some Li2PdCl4. (Don't skip this - it's quite a good
>My pleasure. Best regards,
>From: Sandy King
>Sent: 09 KasĪm 2006 Pers¸embe 03:22
>Subject: Mike Ware's POP Pt./Pd. Pt
>I finally received some ferric ammonium oxalate today and was able to do
>a few tests with Mike Ware's POP Pt./Pd. process. The results were very
>encouraging. The Dmax I was able to get with the sensitizer of FAO +
>Ammonium Tetrachloropalladate (II), on the first try, was definitely
>better than I have been able to get with palladium printing using FO in
>my working conditions. I am working in a room with about 60% RH,
>gives a sepia color print with straight palladium. I am also exposing by
>time, not visual inspection.
>I would also add that working with the FAO is a real delight compared
>to FO. It mixes up quickly and completely in about 5-10 minutes, and
>results are very low fog. I am using Mike Ware's recommended
>post-exposure processing, which you can find oin his web site
>(http://www.mikeware.co.uk/mikeware/Platino-Palladiotype.html), but I
>have also found that I can get contrast control with the Disodium EDTA
>with dichroamte. Mike does not specifically recommend this approach, as
>I recall, but I find that it gives a lot of flexibility to the process..
>In any event, I thank Loris Medici for putting me on the potential
>advantages of FAO. Lots of potential here I believe.