The Cyanotype Process pg 164-174

This section describes the processes you take in order to change your blue cyanotype image into a cyanotype with different colors. The most interesting process was the Basic Tea Toner. You take basic tea and create a very strong solution in hot water. You then simply immerse your print in the tea. This will turn your highlights into a tan color and the blue with take on a slightly warmer hue. Using green and herbal teas without tannic acid in them does not work as well. However you can boil onion skins which will create a bronzing effect.