I have a lovely black tea that is fairly high in caffeine, which I'd like to keep. Unfortunately though, I'm not a fan of the bitterness caused by tannins, and I'd like to remove them if possible without leaching the caffeine as well. I was thinking pre-rinsing the leaves with cold water for example, considering the solubility figures below:    Tannic acid solubility at 25 degees C:  2850 g/Ll Caffeine solubility at 25 degrees C:  20 g/l Caffeine solubility at 100 degrees C:  660 g/l    Are there any experimentally verified methods of doing this? 
Adding a 1/4-1/2 teaspoon of gelatin powder dissolved in the boiling water should do the trick. I fermented some arizona and used gelatin to remove the remaining yeast, only to find it removed the tannins as well, yielding a relatively clear liquid with a dark brown sediment at the bottom. I can't guarantee that it won't touch the caffeine, but i see no reason it would chemically. 