A DIY oxidation chamber is as simple as a plastic bin with a damp cloth interior. After rolling your withered green tea leaves to break cell walls, place them in the chamber at 25-28°C and 85-95% relative humidity. Check every 30-60 minutes until the leaves have turned fully copper-brown and smell of flowers or honey. The whole process takes 2-5 hours for a proper full oxidation. Higher temperatures speed up oxidation but can produce a harsher, over-cooked flavour.
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