How do they look like if projected?
I suppose the are marvellous this way and the slight magenta cast is only a scanner issue.

If the slight magenta cast is not only an scanner issue and visible in the projected slide think about slight pH modifications of the CD.
Look at the Jobo e6 Manual page 76 and 91 and following pages.

http://www.jobo.com/jobo_service_ana...andbuch_GB.pdf

Regards stefan