Slashdot Mirror
Blowing On Money To Tell If It Is Counterfeit
HughPickens.com writes Scientific American reports that simply breathing on money could soon reveal if it's the real deal or counterfeit thanks to a photonic crystal ink developed by Ling Bai and Zhongze Gu and colleagues at Southeast University in Nanjing, China that can produce unique color changing patterns on surfaces with an inkjet printer system which would be extremely hard for fraudsters to reproduce. The ink mimics the way Tmesisternus isabellae – a species of longhorn beetle – reversibly switches its color from gold to red according to the humidity in its environment. The color shift is caused by the adsorption of water vapor in their hardened front wings, which alters the thickness and average refractive index of their multilayered scales. To emulate this, the team made their photonic crystal ink using mesoporous silica nanoparticles, which have a large surface area and strong vapor adsorption capabilities that can be precisely controlled. The complicated and reversible multicolor shifts of mesoporous CPC patterns are favorable for immediate recognition by naked eyes but hard to copy. "We think the ink's multiple security features may be useful for antifraud applications," says Bai, "however we think the technology could be more useful for fabricating multiple functional sensor arrays, which we are now working towards."
Where on earth would anyone get hold of a ink jet printer?
derp
Cool, let's all handle cash that has been breathed upon by anybody with a potentially communicable disease. Screw phone sanitizers, Ark B needs cash sanitizers.
Left MS Windows for Linux Mint and never looked back!
Vote for Bernie in 2016!
Can any of these biomimetic technologies be put to a better use: a low power, sunlight readable, full color display system?
When our name is on the back of your car, we're behind you all the way!
Why blow on money when there's already blow on money?
-- Political fascism requires a Fuhrer.
Or you could just use plastic money like we developed here in Australia. Either way.
The US might adopt this tech.
The kinds of fraud that have Washington Consensus stamps of approval don't involve physical bills and will not be impacted.
Do what thou wilt shall be the whole of the Law
Counterfeiting is illegal.
This isn't so crazy.
I know for a fact that having a hot girl blow on my dice helps me make that eight the hard way.
You are welcome on my lawn.
Fancy breath sensitive ink vs just start making notes out of plastic like everybody else..?
I got a prescription last week, it had a spot on the lower right corner with a red "Rx" logo on it and it said breathe or rub, it fades out the red ink to invisible, then slowly returns as it cools off.
This is not NEW!
-- You are in a maze of little, twisty passages, all different... --
They did it in the lab and published about the method, then how would it be hard to copy?
Yep... US Dollars aren't printed, they're pressed or minted.
Certainly people have thought this was a bad idea before a bunch of Slashdotters thought of it immediately. Do people seriously not think? Or do they have things against cash?
God spoke to me
I've experienced supersaturated air in the US Southeast (not enough dust, ... for the moisture to condense).
How is blowing on money going to raise the ambient humidity in a way to which the bills could respond?
The "100 USD" stripe took years to implement. A color-change ink would require dramatic changes to the printed money system, and look and feel nothing like today's money. This idea is for somebody else, not the USA. Remember, Slashdot is international.
Is that spearmint, peppermint, or wintergreen?
On a more serious note: what does minting currency have to do with the mint plant anyway?
Anyone?
If fiat money is "counterfeit", would FIAT money backed by the promise of A NEW CAR!!!11 * be any better?
* Imitate the voice of The Price Is Right announcer here.
If a crafty person prints $20 bill on the printer, he is a criminal and a counterfeiter.
When central banks create money by simply changing the numbers in the computer, it is called quantitative easy.
Oh, wait. We are being told that cash is getting unpopular, and paying with electronic means is so hot right now.
Or you could just use plastic money
Falco would not approve: "No plastic money anymore, die Banken gegen ihn."
Correct, all modern currencies are counterfeit, including the bitcoins. The countries that have high productive output, like China have currencies that are as counterfeit as the largest welfare recipients, like the USA.
Fake money is created all over the world to steal productivity of the individuals to subsidise the powerful government Mafia structures. The people are hurt, the wealth is stolen. The difference is that while the Chinese government is stealing from the Chinese people with inflation, USA government is stealing from the Chinese as well, such is the property of being 'world reserve currency'. You get to steal from other nations with your inflation while the rest can only steal from their own.
You can't handle the truth.
Gives new meaning to hookers and blow.
"A person is smart. People are dumb, panicky dangerous animals and you know it." - K
This will inevitably result in more people blowing their hard-earned money...
'The Economy' is a giant Ponzi scheme whose most pitiable suckers are the youngest among us and the yet-unborn.
So the article is somewhat suggesting we buy our ink from China to print money? The same country that keeps trying (successfully some times) to hack our businesses and government? It isn't like they would print any counterfeit US money themselves, right? I'm guessing they would put lead in it like they do all the toys and other crap we get from them.
Buy American!
Actually I don't ask or demand anything from anybody, I observe and make my own choices and base my investments on my own understanding of what is going on and one thing is for sure, I am not with the crowd on any of it. I don't expect anybody to change anything based on any actual understanding, I expect things to fail in the way that I predict, that's all. As to my employees, they are paid fair market wages in the currency of their choice, in fact I have people that are paid in bullion.
You can't handle the truth.
...hookers will soon be blowing the cash as well as the customers?
I've calculated my velocity with such exquisite precision that I have no idea where I am.
currency and the mint plant are both green.
Additionally, 10€ coins are not just brought into circulation. You have to buy them for 15-20€ each. They're official currency with 10€ value.
And I just learned that there are also 100€ coins. They're made of pure gold and were sold for material price (up to 700€) + 50€. Would you spend one for the 100€ face value?
I know currency is supposed to be filthy with germs anyway, but do we really want to stick someone else's halitosis and god-knows what oral- and pulmonary disease germs in our wallets?
Cloned foods give the statement "We had that last week!" a whole new meaning.
to see how many different sorts of bacteria and viruses have been coughed all over the notes by disgusting peasants?
The humanity...
This is a reasonable point. Some things should be an 'in-house' affair: minting currency, and producing assault-rifles for your military, are things that a lot of countries prefer to do themselves.
... when it's 85-degrees (Fahrenheit) and 85% humidity in Charlotte?
How fast can you blow a hundred bucks?
If you were me, you'd be good lookin'. - six string samurai
If you've ever seen the machines that make money on TV, you know they're made with a process unlike anything that's available to consumers. Copy machine money doesn't look or feel even close.
Ok and that relates the two meanings of the word 'mint' how exactly? (or you accidentally replied to the wrong message?)