RE: Mike Ware's POP Pt./Pd. Pt

[EJN Photo <ejnphoto@sbcglobal.net>]

Loris, It could be that if only di sodium is being used that the buffers in
the paper are being used up and the paper is losing some strength. I follow
Di Sodium baths with tetra sodium; with both my FO, AFO, PT/PD as well as
with Chrysotypes.

Eric

Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
http://ericneilsenphotography.com
 
Skype : ejprinter

> -----Original Message-----
> From: Loris Medici [mailto:mail@loris.medici.name]
> Sent: Thursday, November 09, 2006 3:02 PM
> To: alt-photo-process-l@usask.ca
> Subject: RE: Mike Ware's POP Pt./Pd. Pt
> 
> Hi Witho. Maybe the problem you mention is related to bad
> clearing /
> washing (=remaining sensitizer / clearing agent in the paper) -
> but I
> don't think the phenomenon is *exactly* caused by the mechanism
> you
> describe.
> 
> My understanding of chelating agent is something that makes a
> soluble
> compound with another compound that is not soluble itself.
> Since there
> will be no water in the paper (except the humidity absorbed
> from the
> environment - a minute amnt. when compared to wet paper), I
> don't see
> any reason for the remaining chelating agent making loose the
> metal
> *trapped* inside the paper's fibers, causing them fall(?) - if
> I'm
> getting you correctly. 1) How will the chelating agent contact
> with
> the metal particles in a dry environment? 2) And how will it
> break the
> physical bonds between the metal particles and the paper's
> fibers?
> 
> Of course I acknowledge that the remaining chemicals may form
> new
> compounds with the image-making metal particles; rendering them
> transparent/colorless, therefore useless for image-making
> purposes...
> But since we're talking about intert noble metals, I don't see
> how
> that could happen!? Quite confusing isn't it? Since you're
> observing
> image loss, for sure something is happening - but what?
> 
> Anyway, your "wash good" suggestion is a very sound one -
> anyone
> dealing with precious metals for doing images should care to
> follow a
> good procedure; it won't make sense to be casual with these
> processes
> / doing so would take much from their value and from their
> purpose.
> 
> Best regards,
> Loris.
> 
> ----- Message from info@witho.nl ---------
>      Date: Thu, 09 Nov 2006 16:50:11 +0100
>      From: Witho Worms <info@witho.nl>
> Reply-To: alt-photo-process-l@usask.ca
>   Subject: RE: Mike Ware's POP Pt./Pd. Pt
>        To: alt-photo-process-l@usask.ca
> 
> 
> > Sandy,
> >
> >
> >
> > 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 ago.
> >
> >
> >
> > Regards,
> >
> >
> >
> > Witho
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >   _____
> >
> > Van: Sandy King [mailto:sanking@clemson.edu]
> > Verzonden: donderdag 9 november 2006 16:15
> > Aan: alt-photo-process-l@usask.ca
> > Onderwerp: RE: Mike Ware's POP Pt./Pd. Pt
> >
> >
> >
> > Witho,
> >
> >
> >
> > Any idea as to the cause of this?
> >
> >
> >
> > Sandy
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > At 9:22 AM +0100 11/9/06, Witho Worms wrote:
> >
> > Hallo Sandy,
> >
> > 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).
> >
> > Regards,
> >
> > Witho
> >
> > -----Oorspronkelijk bericht-----
> > Van: Sandy King [mailto:sanking@clemson.edu]
> > Verzonden: donderdag 9 november 2006 7:41
> > Aan: alt-photo-process-l@usask.ca
> > Onderwerp: RE: Mike Ware's POP Pt./Pd. Pt
> >
> > Hi Loris,
> >
> > 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
> > silver nitrate.
> >
> > Best,
> >
> > Sandy
> >
> >
> >
> >
> >
> > 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
> >> hint IMO.)
> >>
> >> My pleasure. Best regards,
> >> Loris.
> >>
> >> -----Original Message-----
> >> From: Sandy King [mailto:sanking@clemson.edu]
> >> Sent: 09 KasÏm 2006 Pers¸embe 03:22
> >> To: alt-photo-process-l@usask.ca
> >> 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, which
> >> 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.
> >>
> >> Sandy King
> >
> >
> >
> >
> 
> 
> ----- End message from info@witho.nl -----
>