I think I remember reading somewhere that with one of the packaged comb systems -- Ross Rounds -- or something like that, there was some type of freezing as part of the process. Now I remember. Here it is:
"In most areas one additional step is necessary to protect the section from wax moth damage: the covered sections are placed in plastic bags, tightly sealed, and placed in a freezer at 10 degrees F or less (0 is best) for at least twenty-four hours. After freezing, the sections are allowed to come up to room temperature before opening the bag in order to avoid condensation on the sections. The sections may be left frozen indefinitely without crystallization, until removed for market."