Metal foil for heating and cooling foods and method of making same

A method of fabricating a composite sheet comprising:

• providing a metal foil material,
• applying a layer of heat stable, thermoplastic material on a first surface of said foil material,
• applying a layer of a heat resistant, dielectric material on a second surface of said foil material,
• applying a layer of a heat resistant, heat absorptive material in at least two distinct layer thicknesses over said heat resistant, dielectric layer or portions thereof so as to provide a layer visually distinguishable from the heat resistant, dielectric layer,
• applying said heat resistant, heat absorptive material on a first portion of said dielectric material which is to be disposed within the lower one-half of a foil pouch formed from said foil stock and covering at least 10% of said dielectric material with a coating weight of about 1.50 to 4.00 pounds per ream, and
• applying said heat resistant, heat absorptive material on at least a second portion of said dielectric layer at about 15% to 70% less than the coating weight applied to said first portion.