Fruit packaging - of carton with reactive coating containing sodium bisulphite to release preserving so2 vapour

摘要

The corrugate cardboard carton is treated with a resin coating contg. sodium bisulphite, in conjunction with a sealing layer, for the dampness of the fruit, partic. grapes, to set up a reaction and release sulphur dioxide vapour into the carton as a preservative. The purpose is to eliminate sodium bisulphite crystals which can mark the fruit, in a cheap and disposable packing material.