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Exothermic Reaction (108/505)
EXOTHERMIC REACTION: HEAT PACK - INSTANT
Magnesium Sulfate Reacts With Water Creating Heat
Contains magnesium sulfate and water with special additives in a plastic bubble. The bubble is broken by squeezing the bag. The water comes in contact with the magnesium sulfate generating heat.
Copyright:© 1993 Richard Megna - Fundamental Photographs
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