This is a wonderful resource and Jacqui Symons has recently brought a book out which contains vital information for those wishing to reduce their environmental impact in the studio.
Another great resource for making inks: Jason Logan gives practical advice on how to make foraging part of the process. His book has sections on how to make drawing inks with location in mind. You can buy his book through his website which will introduce you to his Toronto Ink Company.
I believe that this American Company are now selling in selected outlets in the UK. Their focus is in detoxifying the studio and have lots of informative sections with videos and recipes. They also have a recipe for Moku Hanga natural water-based relief printing ink.
This link is a bit closer to home Laura Rigby in Fife supplies a good factsheet on Natural inks.
A beautiful website offering tips, recipes and eco printing tutorials.
If you are scientifically minded and want to understand about acids and alkalis then the BBC are best bet.
Lost in Colour has useful recipes for the growing and using the trickier dye-plants for natural inks.
Jacksons Art have an interesting section on environmental ethics in the print making studio.
A Canadian website mainly about fabric dyeing but useful if you want to grow the dye plants yourself.
Jenny Dean’s book Wild Colour can be purchased through World of Books.