Set up for a test on how light fast some of the inks are: testing green tea, onion skin, beetroot, elder berry, and red cabbage.

A sheet of water colour paper has been coloured with the inks then cut into two strips which have been folded into a concertina.

One of these will be left open in the workshop, whilst the other is folded up, bound and kept in a drawer.

Compare results after a year…..