Vermont Cathy wrote:Thanks for your thoughts. Now, is this concern over UV only for when in direct sunlight? At work, I have the good luck of being able to see a window from my desk (not nearby), but sunlight would never land on my desk area. The room is lit with standard office florescent lights. So... if my choices for now are the bags tea comes in from Adagio, or a small jar, which should I choose? I can squeeze more air from the bags, and they block light, but some people have concerns over the plastic, and the jars are prettier.
I think the zip mechanism is plastic but the rest of the bag is foil? At least the smaller sample bags are like this.
I know someone who uses glass mason jars, and he is always having Japanese greens go bad long before I do for the exact same tea ... he even wrapped them in foil to block out light as I recall. But I have no personal experience with glass jars.
I personally use either smaller foil lined zip bags such as the Adagio ones you mention, or I use Upton's small sample tin which holds usually around 25-50 grams of tea (50 of most sencha). So it is small and does not allow too much air in each time I open the tin. I actually then place that into a 2X Japanese Washi tin. Kind of like triple protection ...