Who makes a custom cold pack?

A cold pack creates a endothermic reaction when the chemical reacts, which means that energy is taken from the surrounding, which makes the packaging cold. it is the opposite with a heat pack, an exothermic reaction is created which releases the energy into the surrounding creating the heat. Hope this helped.

A shoemaker or a cobbler makes custom shoes.

chemicals produce a suitable reaction for a cold-pack

You would have to have an Eacthomatdid reaction of chemcal chance to change a cold pack to a hot pack.

Sudden crystallization of a supersaturated solution. This is a physical phase change, not a chemical change.

A cold pack is to make lumps go down and a heat pack is for when your sick.

Ammonium nitrate and water are in separate compartments in the cold pack. To activate the cold pack, you break the compartments in the pack so the ammonium nitrate and water mix. The ammonium nitrate absorbs all of the heat, making the water ice cold.

All burns should be treated with either cold running water or an ice pack. Water is preferable.

its an endothermic reaction

Yes. It is possible to be poisoned by an ice pack.

Just below freezing is ideal

who can make custom music box from my design

the chemicals inside react to create the cold

when you are done with it or when it stops being cold.

ShindigZ makes a lovely Pink Tableware Party Pack.