[Alt-photo] Re: Longevity of Pt/Pl chemistry after being mixed?

[Francesco Fragomeni]

Hi Eric,

Thanks for these thoughts. I'll probably have to just test it like you've
mentioned. I was thinking that there might already be an understanding of
how long these solutions last once they've been mixed together. Thanks for
letting me know about your experience when you tested this.


On Mon, Dec 9, 2013 at 3:56 PM, EJ Photo <ejnphoto at sbcglobal.net> wrote:

> Francesco, I would say to do this for your self. Mix an amount of those
> solutions you currently use; maybe 4 times a normal print. Keep it for a
> week and then make some prints and test it against the color and speed of
> the same from freshly combined chemicals.  In my experience, the combined
> mix of FO and PT/PD mix printed faster and warmer but your results may be
> different. Since I don't know where you get any of your chemistry nor at
> what strength you use it, it is impossible to say for sure. The FO is the
> part that can go bad, create a fog. Remember it is a new solution with a
> new
> equilibrium, so you must do it your self.
>
> I did not run test for storage longer than a few days - 4  to 5.
>
> Eric Neilsen
> Eric Neilsen Photography
> 4101 Commerce Street, Suite 9
> Dallas, TX 75226
>
> www.ericneilsenphotography.com
> skype me with ejprinter
> Let's Talk Photography
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org
> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf
> Of
> Francesco Fragomeni
> Sent: Monday, December 09, 2013 7:19 AM
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [Alt-photo] Re: Longevity of Pt/Pl chemistry after being mixed?
>
> Yes to clarify, I don't mean the longevity of the individual parts
> independent of one another. I mean the longevity of an actual coating
> solution once mixed i.e the Platinum, palladium, and ferric oxalate 1 and 2
> mixed together and ready for the paper.
>  On Dec 9, 2013 5:46 AM, "Philippe Ayral" <payral at gmail.com> wrote:
>
> > Question was about coating solution when *they are mixed into coating
> > solutions and then stored*
> >
> >
> >   [image: Avatar]
> > *Philippe Ayral** Photographie*
> > 52, rue de Vallard - 74240 Gaillard
> > Tél: 04 50 39 79 81
> > www.payral.fr
> >  Designed with WiseStamp -
> > <
> >
>
> http://s.wisestamp.com/links?url=http%3A%2F%2Fr1.wisestamp.com%2Fr%2Flanding
>
> %3Fu%3D61c63ff3188fa5ae%26v%3D3.13.7%26t%3D1373729033240%26promo%3D10%26dest
> %3Dhttp%253A%252F%252Fwww.wisestamp.com
> %252Femail-install%253Futm_source%253
> Dextension%2526utm_medium%253Demail%2526utm_campaign%253Dpromo_10
> > >Get
> > yours<
> >
>
> http://s.wisestamp.com/links?url=http%3A%2F%2Fr1.wisestamp.com%2Fr%2Flanding
>
> %3Fu%3D61c63ff3188fa5ae%26v%3D3.13.7%26t%3D1373729033240%26promo%3D10%26dest
> %3Dhttp%253A%252F%252Fwww.wisestamp.com
> %252Femail-install%253Futm_source%253
> Dextension%2526utm_medium%253Demail%2526utm_campaign%253Dpromo_10
> > >
> >
> >
> >
> > 2013/12/9 Eric Nelson <emanphoto at gmail.com>
> >
> > > The metals should last indefinitely but the FO goes off after 6 months
> or
> > > so. I remember this from when I used to buy premixed FO many years ago
> > > e
> > >
> > > On Dec 9, 2013, at 11:39 AM, Francesco Fragomeni <
> fdfragomeni at gmail.com>
> > > wrote:
> > >
> > > > Hi All,
> > > >
> > > > Just a quick question here. Will platinum, palladium, and the ferric
> > > > oxalate degrade if they are mixed into coating solutions and then
> > stored?
> > > > I'm thinking about an experiment in which a larger than usual amount
> > of a
> > > > coating solution will be mixed and will need to be stored but I don't
> > > want
> > > > to waste time and money on this if the mixed solutions wont last.
> > > Basically
> > > > paper will be floated on the solutions which is why larger amounts
> need
> > > to
> > > > be mixed and then stored in between printing sessions.
> > > >
> > > > Any insight? Will there be any issues with mixed solutions being
> > stored?
> > > > _______________________________________________
> > > > Alt-photo-process-list | altphotolist.org
> > > _______________________________________________
> > > Alt-photo-process-list | altphotolist.org
> > >
> > _______________________________________________
> > Alt-photo-process-list | altphotolist.org
> >
> _______________________________________________
> Alt-photo-process-list | altphotolist.org
>
> _______________________________________________
> Alt-photo-process-list | altphotolist.org
>