URBAN DYERS ALERT! Strike gold! Oak catkins are falling off the trees and into my dye pot. Their high tannin count assures no fading! The last batch dyed this "hand spun/knit throw. Do allergy sufferers a big favor and collect these off the streets. 250g to 15L. Simmer 1 hour, sit for 2 days. Strain. "And it was all yellow"—Coldplay #thegreatbumpkin