"Hi .... the picture shows gold dyed wool, alpaca and mohair fibres which were simmered in a slow - cooker with 15 Buddleia flower heads and no mordant for 4 hours. A mixture of white, purple and magenta flowers were used. All have the same deep yellow center.
Alongside, the same three fibers but with copper sulphate as the mordant, double the previous amount of flower heads, also slow-cooked for 4 hours produced a medium brown on the alpaca and mohair and very dark brown on the wool.
The next experiments will be with alum, iron and also blooms that have 'gone over' (turned brown)."
Thank you very much, Val - what striking colours.
Sadly, my own Buddleia isn't producing many flowers this year so I shall have to leave them for the butterflies. It will be interesting to see how the 'gone over' flowers perform in the dyebath (and what they'll smell like!).