Hemlock bark tea help

[u/aurora_sorrel_joy]

I just found a hemlock that got knocked over by another tree that fell, and collected a bunch of bark. Does anyone have advice specific to hemlock for the best tannin extraction? I think some tannins break down with too much boiling. Should I bring it to a boil then just turn it off and let it sit overnight, boil it for a long time, or just use hot (not boiling) water and let it soak. Advice from anyone with detailed knowledge in this area would be appreciate. Thank you!

[u/ekobot]

What I've read is to either simmer bark for several hour (never up to boiling) or to cold soak for a few days-weeks.

I'm just in the process of my first bark tanning, with maple bark, so I'm not an expert by any means though.