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A microwave heating package, and a method of microwave heating. Both the package and the method employ a lossy chemical susceptor which upon continued exposure to microwave radiation becomes substantially microwave transparent, thus building into the system a unique maximum temperature shut off at t

A microwave heating package, and a method of microwave heating. Both the package and the method employ a lossy chemical susceptor which upon continued exposure to microwave radiation becomes substantially microwave transparent, thus building into the system a unique maximum temperature shut off at the point at which the chemical susceptor becomes microwave transparent. The chemical susceptor is comprised of a combination of a solute, such as inorganic salts of Group IA and IIA, and a polar solvent for the solute, such as water. The chemical susceptor may be composed of a hydrated form of the inorganic salts. The package, method and chemical susceptor may be used for microwave heating of many products, including among others, food products.

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A lossy susceptor device for microwave energy, which upon continued heating by exposure to microwave radiation has a chemical susceptor portion which becomes substantially microwave transparent, said susceptor device comprising: a chemical susceptor comprising a combination of a solute and a polar s

A lossy susceptor device for microwave energy, which upon continued heating by exposure to microwave radiation has a chemical susceptor portion which becomes substantially microwave transparent, said susceptor device comprising: a chemical susceptor comprising a combination of a solute and a polar solvent for said solute, the amount of solute present being as a minimum an amount which will depress the vapor pressure of said solvent, at least by 25% when compared to said solvent\s boiling point at standard pressure; and a holder for said chemical susceptor said holder including vent means which permits escape of solvent from the holder when said chemical susceptor is exposed to microwave radiation.