 The chemical reaction causing the explosion of the pack and the release of the dye creates high temperatures of about which further discourages a criminal from touching the pack or removing it from the bag or getaway vehicle.Dye packs are used to foil robberies in over 75% of banks in the U.S.In England, a robber who fled a bank in Regent Street laughing "Haha, I've got all the money", was enveloped in "a red cloud" of dye as he ran away down Shaftesbury Avenue.