I’ve been experimenting with naturally dyeing solid colours, aided by Rebecca Desnos’ beautiful ebook. I recently tried dyeing soy-mordanted cotton with avocado seeds (avocado stones/pits). When I first put the fabric in the dye bath I didn’t quite believe it would do anything. The dye looked quite pale. But I left it for about 30 hours and it slowly turned this vivid pink!
I tried eco-printing over this fabric but didn’t have much success. But I was able to create a beautiful resist effect on some watercolour paper. I covered some iron-mordanted watercolour paper with gum leaves, then laid a piece of my avocado-dyed cotton on top, pressed it between 2 tiles and boiled for an hour. Some of the avocado dye transferred to the paper and the pink turned to purple in reaction with the iron.