Coffee bags are what packaging category

1, non-airtight coffee bags: this is the most economical kind of packaging. Usually used by small local roasters, because they can guarantee a rapid supply.

2, airtight packaging: after loading the coffee, vacuum and sealed. Due to the formation of carbon dioxide in the roasting process, this packaging can only be packaged after the coffee has been placed for a period of time to make it off-gas, so there are a few days of storage intervals.