Fortune on his 1848 trip through China discovered the Chinese were
adding plaster(hydrogen sulfide gypsum) and Prussian blue(cyanide
paint pigment) to make green tea more green and acted like a
preservative. This was made public in 1851 which gave added impetus
for the East India company to develop India as a tea source.
Jim
On Jul 24, 8:17 am, Thitherflit > wrote:
> Hi--
>
> Some news-- Says that 3 high school students checked a bunch of tea
> samples, and found unlisted (non-tea) plant materials. I haven't
> followed the citation, but the title of the citation is "COMMERCIAL
> Teas..." and I'm sure that is *not* what *I* am drinking 
>
> http://www.stumbleupon.com/su/1HeOyz...ican.com/podca...
>
> jhh