Anti-crime colour balls
Imagine you are a store manager, and a masked thief has you at gun or knife-point, asking you to empty the cash into his or her bag. How would you recognize the thief outside in a crowd of people? Especially if he or she had an accomplice, and the bag exchanged hands?
Or imagine if a home or bank, or the ATM or even the ATM cash van is being attacked by one or more robbers. Depending on if they have covered their faces, and on how well-lit or dark it is outside, you may or may not be able to recognize the culprits, even if they were in front of you in a police line-up.So what might help in such a situation
Surprisingly, the Japanese have had a solution for over two decades. And a very simple yet innovative one. They have been using baseball sized balls made out of colour pigment. The compound has a shelf life of a few years
Banks and other medium-to-high risk places have them at the counters. In case of a robbery, the employee at the desk merely throws a ball at the thief. The balls break on impact, spraying the colour over a 10 meter radius area. And the colour does not wash off easily, so the police or others would be able to recognize them relatively easily, even in a crowd.
So while even the sight of these anti-crime colour balls sitting in a bowl at a counter were a huge crime deterrent, it was found that whenever a crime occurred, the chances of the attendant throwing one at the criminal (perhaps for fear for their own safety), only about 3% actually threw it.
Even if this innovative solution does not find actual human use, imagine its applications. They could be used as part of automated systems that deploy these upon people crossing restricted or cordoned off areas. Or in case of suspicious activity around ATMs or protected areas.
More about it here: source
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