[alt-photo] Re: platinum

Paul Viapiano viapiano at pacbell.net
Mon Dec 20 20:11:23 GMT 2010


As Cor mentioned, pt and pd solutions are near saturation, so it's normal to 
see some precipitate. It doesn't mean that there will be less metal salts on 
the print/paper, to the contrary, your liquid is saturated with as much 
metal as it can hold.


----- Original Message ----- 
From: "David Ashcraft" <davidashcraft at sti.net>
To: "The alternative photographic processes mailing list" 
<alt-photo-process-list at lists.altphotolist.org>
Sent: Monday, December 20, 2010 11:34 AM
Subject: [alt-photo] Re: platinum

>I will take a look but I know the pt isn't old and lately it has been  cold 
>in the dkrm so probably heating the solution will do the trick.
> My supplier said to use up the liquid and then add distilled water to  the 
> leftovers to make more solution.  If the pt is coming out of  solution 
> then there will be less of it on the paper, correct?    Wouldn't this 
> affect the prints or printing in some way?
> Thanks, David
> On Dec 20, 2010, at 6:09 AM, EJ Photo wrote:
>> David, To me the real question is what color is the solid/ precipitate? 
>> If is
>> red crystals, than follow the normal path that Cor has mentioned. If  the
>> prec is grayish/blackish then all the heating in the world will only 
>> make
>> more of it. Occasionally, your solution may have solid particles of  pt 
>> in it
>> either from the manufacturing process or by repeated over heating.
>> There is one well known reseller that I have seen weak and all too  often
>> particles of solid PT in the solutions made from their chemicals.  Always
>> mix, filter and keep a lid on the bottle to help prevent evaporation 
>> since
>> that too will put you in cycle of even more saturated, needing more 
>> heating.
>> Eric Neilsen
>> Eric Neilsen Photography
>> 4101 Commerce Street, Suite 9
>> Dallas, TX 75226
>> www.ericneilsenphotography.com
>> skype me with ejprinter
>> www.ericneilsenphotography.com/forum1
>> 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
>> C.Breukel at lumc.nl
>> Sent: Monday, December 20, 2010 3:12 AM
>> To: alt-photo-process-list at lists.altphotolist.org
>> Subject: [alt-photo] Re: platinum
>>> -----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 David
>>> Ashcraft
>>> Sent: maandag 20 december 2010 5:13
>>> To: The alternative photographic processes mailing list
>>> Subject: [alt-photo] platinum
>>> I have a bottle of platinum solution that has solids at the bottom of
>>> it.  I'm wondering if I should try to get it back into solution or
>>> what other course of action I should take?
>> David,
>> Usually these Pt solutions are near saturation, a drop of temperature
>> can precipitate Pt. Warming up to solution till around 40degC or so
>> could help,
>> Best,
>> Cor
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