The Complete Guide to Custom Coffee Bean Pouches: One-Way Degassing Valves, Barrier Materials and Freshness Selection by Roast Level
Coffee beans keep releasing CO2 after roasting; the wrong packaging will balloon or leak and lose aroma. This article systematically explains the opening pressure differential and air permeability parameters of one-way degassing valves, OTR and WVTR selection for barrier materials such as metallized film and kraft paper laminates, and valve and pouch type matching for light, medium and dark roasts — helping coffee roasters and e-commerce brands choose the right coffee pouch the first time.



