Abstract: The present invention provides a tray for frozen food enabling frozen food such as frozen sushi on the tray to be suitably thawed and to provide a frozen food package or a frozen sushi package using this tray, and a method of thawing frozen sushi in this package. The tray for frozen food 1 comprises a base 3, concavities 2 caved in the base 3, a surrounding wall 4 standing from the periphery of the base 3, a flange 5 composing the top end of the surrounding wall 4, a downward flap 6 extending downwardly from the outer peripheral edge of the flange 5, an overhanging portion 7 overhanging outward from the lower edge of the downward flap 6, ribs 8 formed at corners between the base 3 and the surrounding wall 4, and bulges 9 standing from the base 3. The tray 1 is composed of a body 1a made of a synthetic resin and a dielectric material layer 1b formed on the outer surface of the body 1a.

Abstract: The present invention provides a tray for frozen food enabling frozen food such as frozen sushi on the tray to be suitably thawed and to provide a frozen food package or a frozen sushi package using this tray, and a method of thawing frozen sushi in this package. The tray for frozen food 1 comprises a base 3, concavities 2 caved in the base 3, a surrounding wall 4 standing from the periphery of the base 3, a flange 5 composing the top end of the surrounding wall 4, a downward flap 6 extending downwardly from the outer peripheral edge of the flange 5, an overhanging portion 7 overhanging outward from the lower edge of the downward flap 6, ribs 8 formed at corners between the base 3 and the surrounding wall 4, and bulges 9 standing from the base 3. The tray 1 is composed of a body 1a made of a synthetic resin and a dielectric material layer 1b formed on the outer surface of the body 1a.

Abstract: In order to sufficiently and properly thaw frozen food such as frozen sushi, a thawing-heating tray made of dielectric material is provided with thick portions disposed in the central region and the peripheral region thereof, respectively. Fixed to this tray is a reflector. The frozen food is placed on the tray and is then thawed by an electronic oven.