water. If plate frozen, the top flap of the package is opened and a 32°F (0°C) water
spray (for example, the Sort-Rite glazing machine) is applied. The package
is then closed and put upside down into the master carton. Any excess moisture
still within the package will go to the top of the box and act as a further sealant.
Glaze is usually provided to prevent dehydration (freezer burn) and oxidation of
the product while in cold storage by supplementing the protective effect of the
outer package.
Sometimes thickening agents such as carboxy-methyl cellulose (CMC), sodium
alginate, and antioxidants such as ascorbic acid and preservatives are used in the
glaze solution to extend the shelf life. Such additives provide structure control,
minimize weight losses, seal the flavor and act as a barrier against oxygen and
moisture.