I’ve begun doing some natural dye experiments with the plants in my backyard. This is the first and unfortunately didn’t work out.
This plant I believe is a clustered bellflower (campanula glomerata):
I wanted to see if the purple flowers could be used as dye. A quick google search online gave me nothing about the flowers as dye material, which wasn’t a good sign, but I thought I would see what happened.
I picked a bunch of the petals and put them in a jar, covering them with hot water.
After only 15 minutes I was already starting to see some colour coming from the flowers.
A day later the flowers had lost all their colour and turned white.
I used half the liquid to try dying a small piece of silk/cotton fabric with no result. With the rest I added a small amount of alum, which turned the colour to a bright blue and put in a swatch of cotton and small piece of wool yarn.
The jar then sat out in the sun and after a few days the blue started fading until it eventually went clear, but the swatches retained no colour.