There has been a press release in the UK, that describes the reduction of gold salts, to a colloid by the use of Darjeeling tea.Allegedly to produce materials for chemotherapy trials Very British, even though the guys doing the work were at the university of Missouri (!)
Big Scientific paper here.

This of course got me thinking on a cold, wet Wednesday morning in the UK.
Developing film in the blend of instant coffee and washing soda is now well documented, but has anyone ever tried replacing cheap instant coffee with a brewup of tea and washing soda instead?
If this is a first I might get shooting some cheap rolls of film this weekend and giving it a blast