>Question #1 Is stainless steel as fertile a medium for contamination as other
>metals ? Or Aluminum as has been mentioned on this list ? And are Hake
>bruches the only way to go in the application of sensitizer because they
do not
>have any ferrule.
Metals not in particulate form do not actually contaminate. Phil Davis (God
has 9 zones, Phil has 21) once related to me that he coated a print with
steel wool to test this theory and nothing out of the ordinary happened.
The reason for keeping ferrous metals out of the system is that they will
cause the pt/pd to "plate" out on the ferrous metal. Phil probably had some
nice platinum plated steel wool after his experiment. We had a teacher once
who took all his students platinum that was purchased for the workshop and
decided to dissolve it by heating water in a stainless steel coffee pot. He
called during the class and asked why his solution was only slightly pink!
Voila, he now had a platinum plated coffee pot.
What happens is that teensy weensy pieces of ferrous metal imbedded in the
paper fibers will plate out and enlarge the orignal particle and will appear
black. Why not shiny? Something to do with the size etc. Can any physics
types out there explain this. Schramm?
Dick Sullivan
Bostick & Sullivan
1541 Center Dr.
Santa Fe, New Mexico
87505