U of S | Mailing List Archive | alt-photo-process-l | Re: Idle Curiosity [was RE: NA2 with AFO

Re: Idle Curiosity [was RE: NA2 with AFO

Judy,

Na2 ia a terrible abbreviation of the chemical formula Na2PtCL6, it is not even an essential part of the contrast control, as hexachloroplatinic acid H2PtCL6 will work and perhaps other salts as we. It is the PtCL6 that matters. I am sure future generations of platinum printers will spend countless hours researching this mysterious substance used in the beginning of the 21 century, Na2.

It is not any more trouble to type Na2PtCL6 then Na2, so why not identify the substance correctly.

Marek

From:  Jeremy Moore <jeremydmoore@gmail.com>
Reply-To:  alt-photo-process-l@usask.ca
To:  alt-photo-process-l@usask.ca
Subject:  Re: Idle Curiosity [was RE: NA2 with AFO
Date:  Wed, 15 Nov 2006 10:21:40 -0600
>Yes, it's shorthand for the sodium chloroplatinate used (usually) as
>a
>contrasting agent in pt/pd printing.
>
>On 11/15/06, Judy Seigel <jseigel@panix.com> wrote:
>>
>>
>>On Sun, 12 Nov 2006, Jeremy Moore wrote:
>>
>> > "Na2" is Sodium Chloroplatinate and "dichromate" is ammonium or
>> > potassium dichromate--2 completely different chemicals.
>> >
>>
>>What piqued my curiosity, Jeremy, was that to the layperson (and
>>even a
>>chem grad I consulted) Na2 means 2 molecules sodium, or like that.  
>>Is
>>that some kind of shorthand used by platinum printers?
>>
>>J.
>>

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