ethan wrote:TimsMom, That's quite a collection for a "novice"! I see 17 ...
I've seen people write that partially full tins allow air inside the tin to effect the tea. Any opinions on how significant or insignificant this air is?
Are metalized, resealable zip bags better because one can squeeze the empty part of the bag flat to push most air out?
I would say that the effects of oxidation on the tea is determined by the actual amount of oxygen available in the tin to oxidate the tea. In large containers, I can see this being significant. But you always see people storing tea in large containers, and taking a bit out at a time. For roasted or already oxidized tea, I don't see this as being a problem really. I put a tiny bit of yancha in a 500 gram capacity container for about half a year just as an experiment and the fragrance actually got a lot stronger, both in the tin and when brewing, and I couldn't notice a negative change in the tea. For greener teas, this obviously doesn't apply.