A technical can cool or heat food by the use of a PCM gel or Phase Change Material, injected at the bottom or the containment chamber of the technical plate. The chamber is designed to contain said PCM material. The technical plate is essentially composed of two parts: an upper and a lower, the upper part forming a support plane whose surface is apt to support, chill or heat the food, and the lower part is in the manner of the box-shaped body having at least a containment chamber of the PCM material. The supporting surface is preferably induction welded, forming an integral part with the lower part or box-shaped body with the containment chamber of the PCM material, after the PCM material has been injected to fill the said containment chamber.
