obliguhl said:
Yes, you can use an egg white to filter out the tannins. Now we need a vegan way. Not that I'm vegan but...just to cover everything
here's a basic guide of amounts for wine
Gelatin Positive tannin reduction in red wine 1/2 g/gal
white wine clarification 1/8 g/gal
Remove bitter taste in white wine 1/4 g/gal
Egg-whites Positive bitter tannin reduction in red wine 1/2 to 3 ml/gal
for red wine clarification 1/2 to 2 ml/gal
MHRB would i guess need more, but this may be handy to stop your whole solution glugging up.
[and proteins (e.g. gelatin) with MAOI's can be a little dodgy
Possible vegan option [might need more research]
Kieselsol
(Silicon dioxide) Neg. (typical) Pos. (available) 1.4-2.2 ml/liter reduce proteins and bitter tannins
remove gelatin
compact bentonite 1.4-2.2 ml/liter
[extra info re bentonite - Strict vegans might prefer a wine where an alternative, like bentonite clay, is used instead. Bentonite is a natural substance that forms when fine volcanic dusts come into contact with water at a critical moment. This all occurs completely organically. (Three cheers for the forces of nature at work!) Since this clay has a negative charge and wine proteins have a slightly positive charge, the two attract. This allows winemakers to remove impurities in the wine and stabilize it.
ref
http://home.comcast.net/~jimalexander2/Fining.htm