Re: NA2 For Pt/Pd BLENDS

I've had some correspondence with Dick about this issue, and his
testing indicates that it DOES NOT work with a pt/pd blend because the
presence of the platinum metal readily converts the oxidation state of
the Na2 from 4 to 2, (or normal pt metal salt in other words) which
basically leaves you with just a standard blend of pt/pd. His tests all
had an ES of 1.5 no matter what amount of Na2 he added. So he feels
pretty sure that it only works as a contrasting agent for pure
palladium. I'm reviewing some of his stuff on Na2 for his second
edition right now, and I just stumbled on that interesting fact last
night.

Clay
On Dec 5, 2003, at 11:04 AM, bobkiss@caribsurf.com wrote:

> DEAR SANDY,
> Dick Arentz's table is one of the things I have saved but it seems
> to be for pure Pd, not Pt/Pd blends ...unless I am missing something.
> I am hoping someone has used it with Pt/Pd blends.
> CHEERS!
> BOB
>
> ----- Original Message -----
> From: Sandy King <sanking@clemson.edu>
> Date: Friday, December 5, 2003 12:36 pm
> Subject: Re: NA2 For Pt/Pd blends
>
>> Bob,
>>
>> Na2 definitely works. Dick Arentz has some data on its use at his
>> web site.
>>
>> http://www.dickarentz.com/
>>
>> Sandy
>>
>>
>>
>>
>>
>>> DEAR LIST,
>>> I have saved the recommended dilutions and numbers of drops for
>>> using Na2 as a contrast controling agent for pure Palladium
>> printing.
>>> I usually use a Pt to Pd drop ratio of 1:3. Eg 4 drops Pt plus 12
>>> drops Pd plus FO. My questions:
>>> 1)Does anyone on the list have experience using Na2 as a contrast
>> agent>with Pt/Pd blends?
>>> 2) Does it work?
>>> 3) Would you be willing to share your data?
>>> Thanks in advance!
>>> CHEERS!
>>> BOB
>>
>>
>
Received on Fri Dec 5 13:40:59 2003