Cyanotype Toning
You can shift the colour of a cyanotype print using toning. The iron in the cyanotype pigment functions as a mordant for other pigments to bind to the fabric, so it is actually a fairly durable dye technique.
I learned most of what I know about cyanotype toning from Annette Golaz’s book on the subject.
Here are some examples of my work with this technique:
