RE: platinum exposure question

My 2 cents worth:

Get palladium. Use it alone, or maybe up to 1:1 Pd:Pt. For my taste, the
less pt, the better.

He will gain about 1 stop of printing speed by using potassium oxalate
instead of ammonium citrate. And, for my taste, nicer looking prints.

I think using strait Pt was the main issue.

Kerik

> -----Original Message-----
> From: Christina Z. Anderson [mailto:zphoto@bellsouth.net]
> Sent: Tuesday, March 09, 2004 6:38 PM
> To: Alt List
> Subject: platinum exposure question
>
> Here's some more info from the student.
> Thanks already for all the answers you guys have given me; I reported all
> to
> him.
> Chris
>
> "Glass is new, bought it yesterday and made sure that it was NOT uv glass.
> this was my best guess as a starting point for my problems, but it did not
> improve the situation.
>
> I am using Digital Negs printed on Pictorico OHP film. substrate has
> worked
> well for both cyanotype and gum.
>
> My chem should be fresh, just ordered it from B&S about a week ago, and i
> am
> mixing it at 15 drops of solution 1, 7 drops of solution 2 and 24 drops of
> the platinum solution 3. will using a Pt/Pd mix or straight Pd make the
> emulsion any faster?
>
> For developer i am using Ammonium citrate at aprox. 75 degrees F. warm/
> hotter Dev will affect my contrast/image color and image feel, but will it
> increase the 'speed' of the pt emulsion?
>
> Still trying to decide on a good paper with a reletivly smooth surface and
> good wet strength.
> so yeah, when i coat my paper i let it air dry in the dark for 5-8
> minutes,
> and then use a hair dryer to finish it off. i am exposing within an hour.
> there is no flake off in the developer, so the emulsion is not too much on
> the surface of the paper. "
>
>
Received on Tue Mar 9 21:40:16 2004