Techniques

I hope to try some of these techniques to alter the color and combine with other media.  Also has some interesting historical background:

http://www.christopherjames-studio.com/materials/The%20Book%20of%20Alt%20Photo%20Processes/SAMPLE%20CHAPTERS/CyanotypeProcessSm.pdf


and another source:

http://www.mikeware.co.uk/mikeware/main.html