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DogMa

wrote:
> ... adressing polymerisation,
> maybe you or someone else knows if the presence of iron ions helps in
> forming insoluble complexes with the goodies (polyphenols) present in
> tea ?

Don't know by reading or experiment, but it would almost have to: both
as a "core" for multidentate binding by several polyphenols or other
ligands, and as a redox catalyst to enhance the further polymerization
and cross-linking of the goo.

-DM