Observation of Evaporation of Soy Sauce at Pouring Lip of Liquid-Packaging Bags

Abstract

A new container consisting of a plastic case and a liquid-packaging bag with a simple pouring lip for liquid food products, such as soy sauce, has been developed in recent years. The new container is capable of delaying the discoloration and decay of liquid food products, although the reason for this remains to be determined. In this study, to determine the above reason, soy sauce in droplets, at the end of glass channels made to simulate the pouring lip and at the end of actual pouring lips was observed. Results indicated that salt crystals are present in the droplets and at the ends of the channels and the pouring lips.