On Tue, 04 Apr 2006 08:07:52 -0500, "Barry Kleider"
<bkleider@sihope.com> said:
> I've been teaching a high school chemistry class using the cyanotype
> process as our point for understanding chemical reactions.
Check out Lawrence and Fishelson, 1999. UV catalysis, cyanotype
photography, and sunscreens, J. Chem. Ed. vol 76, 1199-1200.
> We've talked about how potassium is the marker element for iron...
I don't know about that...
> I'm looking for a way to explain the photo-reactive properties of the
> process. I assume that the image formation is the result of a chemical
> reaction. (Am I right?) What does light do in this process? How?
The above article should be a good starting point.
> Is this a simple oxidation process?
It's a reduction process.
> Why does it leave an image?
Because of imagewise exposure causing imagewise reduction.
Received on Tue Apr 4 07:29:38 2006
This archive was generated by hypermail 2.1.8 : 05/01/06-11:10:23 AM Z CST