In summary, aluminum foil bags of various sizes are currently the most suitable packaging bags for tea. Environmental protection, this is a problem, but it is not the point to care about aluminum foil bags. To talk about environmental protection, first remove the big gift boxes outside the various gift teas. From the perspective of environmental protection, how many aluminum foil bags can hold such a silly gift box. Every time I go to the packaging market to choose packaging and see various eye-catching gift boxes, I always think of the famous question on Zhihu: What is the current level of Chinese aesthetics? There are two main advantages of aluminum foil bags. One is good sealing. After being sealed by a hot press, it is very suitable for storing oolong tea, black tea and other teas that need to be isolated from air. Oolong tea and black tea need to be isolated from the air because at the end of the production process, oolong tea and black tea have to be roasted many times to minimize the water content in the tea. If the air is not cut off, the tea will quickly absorb the moisture in the air and then turn green. Once the tea gets damp, it can be rescued by re-roasting, but the re-roasting will deplete the inner quality of the tea. Therefore, some Taobao "old teas" claim to be re-roasted many times, which is purely flickering. The second advantage is that the aluminum foil bag has a certain degree of hardness, so it has good support. After the rock tea and black tea are roasted, the cords are extremely crisp, and the packaging bag has a certain degree of support, which can protect the integrity of the cords during transportation and storage. Various types of ceramic pots are not well sealed, so they are only suitable for storing Pu'er, dark tea and other teas that require water during the transformation process. Green tea, black tea, and oolong tea are not suitable for storage in ceramic pots. The ancients used ceramic pots because there was no better choice under the conditions at that time. Tea cans with good airtightness are tin cans
