Heat producing mask and method of use

In the method of using a heat producing mask to closely fit body contours and transmit heat thereto, the mask including a flexible plastic container containing a supercooled aqueous salt solution, the steps that include

• (a) triggering the crystallization of said solution to initiate exothermic heat production,
• (b) during said crystallization, preventing stiffening and maintaining flexibility, of said container and of the salt crystallizing therein, and
• (c) applying the warm flexible container to a contoured body to locally heat the body to heat conduction thereto,
• (d) massaging the container to displace salt crystals to prevent stiffening and maintaining flexibility of the mask during re-crystallization.

In the method of using a heat producing mask to closely fit body contours and transmit heat thereto, the mask including a flexible plastic container containing a supercooled aqueous salt solution, the steps that include

• (a) triggering the crystallization of said solution to initiate exothermic heat production,
• (b) during said crystallization, preventing stiffening and maintaining flexibility, of said container and of the salt crystallizing therein, and
• (c) applying the warm flexible container to a contoured body to locally heat the body by heat conduction thereto,
• (d) said body comprising a human face, the container becoming substantially filled with crystallized salt, said (c) step including locally fitting the warm container and salt therein to the facial contours by locally exerting pressure against the container applied to the face.

A heat producing face mask to closely fit facial contours for transmitting heat thereto, comprising

• (a) a flat plastic container having the form of a face mask,
• (b) said container containing a supercooled salt solution adapted for triggering of the solution to initiate crystallization accompanied by exothermic heat production,
• (c) said mask being flexible so as to be manually deformable during or immediately after said crystallization for preventing stiffening of the container and its contents, the mask sized for said close fitting to facial contours while flexible and warm, to heat the face,
• (d) and including a trigger comprising a trigger strip in the container to which force is transmissible via a side wall to deform the trigger, thereby to initiate said crystallization, and a peripheral frame within the container loosely and peripherally supporting the trigger strip to allow the trigger strip to deform relative to the frame, the frame being free to move with the trigger in the container.