Miipurr in the dye pot.
As a dye it is quite fugitive though - washing away on wool to a pale fawn. I think perhaps there is a lot of tannin in there which is good to know too as its useful for mordanting cellulose fibres. More tests with some mordants are needed. The colour is spectacularly rich and beautiful though as a pigment on rag paper - which we discover when we use it for our big drawing the next day.