Several researchers have proposed that carbon dioxide might first be solubilized into the liquid section from the treated tissue to form carbonic acid (H2CO3), and investigations by the authors are likely to confirm this step, and to point the achievable immediate use of carbonic acid for retarding bacterial spoilage. https://www.linpack.com/news/why-food-packaging-machine-manufacturers-are-vital-to-the-global-supply-chain