platinum exposure question

From: Christina Z. Anderson ^lt;>
Date: 03/09/04-08:37:59 PM Z
Message-id: <005301c40648$d7d0bdd0$6101a8c0@your6bvpxyztoq>

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 Tue Mar 9 20:40:11 2004

This archive was generated by hypermail 2.1.8 : 04/01/04-02:02:05 PM Z CST