U of S | Mailing List Archive | alt-photo-process-l | RE: Mike Ware's POP Pt./Pd. Pt

RE: Mike Ware's POP Pt./Pd. Pt

I know what Na2 is and have used it as a contrast agent. I just did not know that it was called Platinum 6. Several people I know have adopted this method of contrast control and it does have some advantages. However, I have continued to use dichromate for straight palladium work because the use of Na2 causes a shift in color, i.e. the more you add the more neutral the color becomes, whereas with dichromate you get the same color over a wide contrast range. At least that is my experience. I believe you suggested in an earlier message that the use of dichromates causes a change in color, but I sure have not found that to be the case with pure palladium.


At 11:46 AM +0100 11/11/06, Witho Worms wrote:
See the Bostick&Sullivan site: Na2- A New Contrast Agent - An interesting
salt of platinum allows for wide ranging contrast control in the
platinum/palladium process. Great news for all platinum printers, read this!
(http://www.bostick-sullivan.com/techart.php) You will there find some other
interesting information on POP too.

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Van: Sandy King [mailto:sanking@clemson.edu]
Verzonden: zaterdag 11 november 2006 1:39
Aan: alt-photo-process-l@usask.ca
Onderwerp: RE: Mike Ware's POP Pt./Pd. Pt

What is Platinum 6?


At 6:14 PM +0100 11/10/06, Witho Worms wrote:
I would recommend using Platinum 6 as a contrast agent for DOP. I can work
very well. Dichromate is very effective in POP but affects printing colour.



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