Reusable self-heating hair roller

A method for using a hair roller to curl or style hair:

• said roller comprising:
• a fluid holding body having a shape compatible with curling or otherwise styling hair;
• said body being elongated and having first and second closed end portions of substantially matching size, a wall portion extending between said end portions providing a hair wrapping region of said body, and a main cavity defined by said wall portion providing a fluid chamber that is closed at each end by said first and second end portions;
• a supercoolable fluid sealed within said fluid chamber in fluid contact with said wall portion of said body, said supercoolable fluid being capable of being supercooled to room temperature while remaining in a liquid state, said supercoolable fluid being further capable of undergoing exothermic crystallization in response to a nucleation event in order to generate heat for hair curling, with said hair curling heat only having to transfer through said wall portion of said body and directly into hair wrapped around said hair wrapping region without passing through any other material;
• and
• a nucleation initiator in said body in contact with said supercoolable fluid;
• said method comprising:
• rolling said hair roller in a user's hair and activating said nucleation initiator to commence exothermic crystallization of said supercoolable fluid.

A reusable self-heating hair roller comprising:

• a rigid or semi-rigid fluid holding body having a generally cylindrical shape compatible with curling or otherwise styling hair;
• said body being elongated and of unitary construction, having first and second enlarged end members, a wall portion extending between said end members providing a hair wrapping region of said body, and a main cavity defined by said wall portion providing a fluid chamber;
• said first end member having a hollow interior that provides an opening for accessing a first end of said main cavity;
• said second end member having a solid configuration that includes an interior wall that closes a second end of said main cavity:
• a supercoolable fluid disposed in said fluid chamber in fluid contact with said wall portion of said body, said supercoolable fluid being capable of being supercooled to room temperature while remaining in a liquid state, said supercoolable fluid being further capable of undergoing exothermic crystallization in response to a nucleation event in order to generate heat for hair curling, with said hair curling heat only having to transfer through said wall portion of said body and directly into hair wrapped around said hair wrapping region without passing through any other material;
• a trigger mounted on said first end member and covering said hollow interior, said trigger being formed as a button-shaped member and acting as a seal that seals said main cavity at said first end member in order to retain said supercoolable fluid in said fluid chamber;
• and
• a nucleation initiator in said body in contact with said fluid and being sequestered in the vicinity of a designated activation location on said hair roller, said nucleation initiator being arranged to be actuated by said trigger.