I dyed some wool last week. Method: cling film and a steam cooker.
This is Finnish wool, a mix of Finnsheep and Finnsheep/Texel cross. Soft and not very long, just above 7 cm which is what’s required for commercial tops. It behaves a bit like Merino: gets bigger and bigger while drying because of great amount of crimp.
I’ll spin two braids during TdF.