Reusable Heater

Re Bao

How it works:
A sodium acetate heat pad is a reusable heat reservoir. It contains a supersaturated solution of sodium acetate (NaCH3COO). Crystallization is triggered by flexing a small flat disc of notched ferrous metal embedded in the liquid. Pressing the disc releases very tiny adhered crystals of sodium acetate[1] into the solution which then act as nucleation sites for the recrystallization of the remainder of the salt solution. Because the liquid is supersaturated, this makes the solution crystallize suddenly, thereby releasing the energy of the crystal lattice. The use of the metal disc was invented in 1978. The pad can be reused by placing it in boiling water for 10–15 minutes, which redissolves the sodium acetate in the contained water and recreates a supersaturated solution. Once the pad has returned to room temperature it can be triggered again. Triggering the pad before it has reached room temperature results in the pad reaching a lower peak temperature, as compared to waiting until it had completely cooled. from Wikipedia

Used for:
Used for warming of parts of the body in order to manage pain. Localized application of heat causes the blood vessels in that area to dilate, enhancing perfusion to the targeted tissue. Trecking, ...

How to use it:
- Break off the iron sheet with your hands
- The crystal discharged heat for more than 40 minutes
- In order to use it again, you need to wrap it with towel (to protect the plastic bag), and boil it with water in a pot for about 10 minutes. Then, when the liquid is cool, take it out and break off the iron sheet to use it again...

Size: 10cm x 15cm.