(57) A composite sheet stock for microwave heating comprises a susceptor sheet (30) having
a dielectric support layer (36), a heater layer (34) of microwave interactive material
and a heat-conducting microwave reflecting layer (130). A receptacle with a self-supporting
configuration for combined microwave baking and cooking of a food article, such as
pizza, is constructed from susceptor stock and comprises an outwardly exposed, dielectric
support layer, such as paperboard, and an inwardly facing heater layer and includes
a lower flat portion for supporting the food article during heating. The lower portion
may be a layer of composite stock as above or it may be formed from at least two layers
of susceptor stock without a heat-conducting layer. The lower portion of the food
product is, thus, heated primarily by conduction, while the upper portion is heated
by combined radiation from the susceptor sheet and absorption of microwaves passing
through the susceptor sheet. The receptacle may be collapsible.
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