Modified atmosphere packages and methods for making the same

This invention describes a way to package raw meat to maintain its fresh red color for longer. A piece of meat is sealed in an inner package that lets oxygen through, then placed inside an outer, oxygen-blocking package. A special gas mixture with a small amount of carbon monoxide is introduced between the packages to make the meat look red and remove oxygen, often with the help of an oxygen scavenger, before the outer package is sealed.