Re: Ziatype problem

[Eric Neilsen <e.neilsen@worldnet.att.net>]

I would STAY AWAY from H202 and platinum.  It will reduce the platinum. 
 The use of Lithium and platinum together may also be interacting in 
unintended ways.  Mixing and creating new coating solutions is fun but 
not all components will simply fit together.

EJ Neilsen

Don Bryant wrote:

>Joe,
>
>
>
>>Lately (in the last week or so) I have noticed an orange precipitate when
>>
>I
>
>>add Sodium Chloroplatinate as a contrast agent.
>>
>>Does anyone have a guess what is happening?
>>
>>The mix I use is 6 Ammonium Ferric Oxalate, 4 Lithium palladium chloride,
>>
>1
>
>>gold chloride, 1 Sodium Chloroplatinate, 1 hydrogen peroxide.
>>
>
>How are you clearing your prints? I take it that the percipitate is  not
>composed of small specks but more of a stain? Also what is the purpose of
>the peroxide in your drop formula? Is the NA2 a 20% or 10% solution?
>
>Don Bryant
>
>
>

-- 
Eric Neilsen
10219 Lynford Drive
Dallas, TX  75238
214-349-8606