ABSTRACT
Preservation of food has occupied and continues to occupy a large portion of man’s time and effort. Early man preserved his food supply by applying methods of preservation available to him in his environment. Sun drying, salting, and fermentation were used to provide food in periods when fresh were not available. As civilization developed, demand for greater quantities of better quality processed food also increased. Hence there has developed a large food-preservation industry which attempts to supply food that is satisfying, nutritious, and economical. Thermally processed foods constitute a large part of this industry.
