Currency bills

Question 12.5 Why Is It Incorrect to Call U.S. Bills Paper Currency ... 

Anatomy of a Bill The Currency Paper, Secrets of Making Money. NOVA Online,... 

The Central Bank is responsible for maintaining a steady supply of currency in circulation (it just never seems to find a way into our pockets). Suppose the targeted quota for the number of 20 bills in circulation is 0.75 billion. Bills must be removed from circulation when in... 

Arkansas Resident Charged with Possession of Ricin — Canadian customs officials intercepted a man carrying a stack of currency. A white powder was interspersed between the bills. Suspecting cocaine, customs personnel had the material analyzed and discovered that it was ricin, a strong toxin, and not cocaine. The Arkansas resident was charged with possession of ricin in violation of the Biological Weapons Anti-Terrorism Act of 1989. 

Paper currency with a polymer weave, more than one polymer strip woven into the bill... 

Problems concerning money — no, I m talking about math problems, not just any problem over money — involve the value of the currency or coin or vending unit along with the number of each of these monetary values. The theme of the quality x quantity applies very well here, where the quality is the coin value, bill value, or commodity value in the problem. 

Did you ever pay for an item with an American 20 bill and watch the clerk make a mark on it with a felt-tipped pen The clerk is determining whether the bill is actual currency or counterfeit.The special pen that the clerk uses contains an iodine solution. I2 forms complexes inside the helices of the polysaccharide amylose that is a component of starch. 

The only problem with the paper is that it is absolutely white. A real bill is not white. It s a combination of greenish, yellowish brown in a very light rim. At the end of the process you have to dye the bills with the tint that matches the real U. S. currency. Foreign bills have different tints. 

On U. S, currency, and particularly the 20 dollar bill, there is one very troublesome place. Thar is around the eyes. Some way, they have made this area very difficult for a camera to pick up. 

U.S. currency, up to 80 percent, bears traces of cocaine. However, this does not mean that every contaminated bill has been used to snort cocaine or has come in direct contact with the drug. It only takes one cocaine-tainted bill to contaminate an entire cash register full of money. Considering the millions of automated teller machines, money sorting and counting machines, and cash registers in the United States, it is easy to see how quickly much of the country s currency would become contaminated with cocaine. 

Goddamn bet your ass it is. Yankee dollar, best goddamn currency in the whole fucking world. Everybody knows that." He snatched up a bottle of Norfolk Tears from beside the bills. 

Chemists are heavily involved in the manufacture of our currency. In fact, in a very real way, the money industry depends on chemistry and finding substances with the correct properties. The most common paper currency in the United States is the dollar bill. Chemistry is used to form the ink and paper and in processes used to defeat counterfeiters. The ink used on currency has to do a variety of things. It must be just the right consistency to fill the fine lines of the printing plate and release onto the paper without smearing. The ink must dry almost immediately, since the sheets of currency fly out of the press and into stacks 10,000 sheets tall. The pressure at the bottom of the stack is large, and the ink must not stick to the back of the sheet above it. 

The security of our currency also depends on substances in the ink, which is optically variable. This color-changing ink shifts from green to black depending on how the bill is tilted. The ink used for the numbers in the lower right corner on the front of 10, 20,... 

Once the currency is printed, it has to undergo durability tests. The bills are soaked in different solvents for 24 hours to make sure that they can stand dry cleaning and chemical exposure to household items such as gasoline. Then the bills must pass a washing-machine test to be sure that, for example, your 20 bill is still intact in your pocket after the washer is through with it. Paper currency is a blend of 75% cotton and 25% linen. Last, the bills must pass the crumple test, in which they are rolled up, put in a metal tube, crushed... 

Microscopy is indispensable in forensic science, where it is used to examine crime scene evidence such as blood, hair, dust, fingerprints, tiny shards of glass, and threads of fiber. Criminologists use high-powered microscopes to help them study the minute hand motions that were used to construct signatures on suspicious documents, looking for frequent stops and starts or other signs of possible foi ery. Counterfeit currency makers are often foiled by microscopes, which help scientists detect very subtle discrepancies in the color and texture of the paper fibers used to manufacture counterfeit bills. 

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