What is the difference between freezing and deep freezing ...
Refrigeration used to preserve foods dates back to prehistoric times. At the time, people used snow and ice to store hunting products. Slow freezing was risky; it was not until the 20 th century that the commercialization of frozen foods began with the discovery of a rapid freezing method: the deep freezing.. In order to reach a negative core temperature for preservation, there are 2 options ...