The experience is to use natural color( from boiling colorful fruit or plant) dye the material with different condition.
The oil in wool is preventing the wool to be dye but since there are only little time t0 do the experiment so there are no too much difference. ( In this case we do 30s and 1 min)
After adding the acid, the color come out is very different. It was before pink color and now it is purple.