Re: platinum exposure question

From: Richard Sullivan ^lt;>
Date: 03/10/04-09:26:20 AM Z
Message-id: <>


Have him call B+S and and our help desk will take a shot at it.


At 07:37 PM 3/9/2004, you wrote:
>Here's some more info from the student.
>Thanks already for all the answers you guys have given me; I reported all to
>"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 Wed Mar 10 09:29:31 2004

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