SN > wrote:
>What is the reason "astringency" feels stronger in a hot tea?

I don't know, but temperature changes flavours a lot.

For example, when you make ice cream, you have to sweeten the cream mix
more than you would find pleasant by itself, because once it is frozen
it will seem less sweet.

Chilling things kills a lot of flavours. It's why you have to drink
American beer ice cold. But it doesn't kill all of them, so it changes
the overall flavour balance.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."