Re: NA2 For Pt/Pd BLENDS

Clay,

That is interesting, but it definitely worked here.

Have you tested this?

Sandy

>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 14:18:18 2003