The paper of US dollar bills is made of cotton and hemp. The long cotton fiber makes the paper not easy to break, absorb ink well and fade. Hemp fiber is strong and tough, which makes the paper crisp and lint-free for a long time, and has certain resistance to water, oil and some chemicals.
the main component of RMB paper is short cotton wool, which is smooth, tough, folding-resistant, stiff, and has certain chemical resistance. It can be used for a long time and is not easy to be damaged. Ink is one of the main components in banknote printing. The fourth set of RMB uses a variety of anti-counterfeiting inks, such as colorless fluorescent ink, metamerism ink and magnetic ink.
Extended information:
1. Gold content
In 1792, the US dollar adopted the gold and silver double standard system. According to the Coinage Act promulgated that year, one dollar was converted into 371.25 grains (24.57 grams) of pure silver or 24.75 grains (1.638 grams) of pure gold. Until 1873. And a dollar's worth of 24.57 grams of silver is roughly equivalent to a Spanish silver dollar.
Because the U.S. government rarely minted a dollar coin, the Spanish silver dollar was one of the main currencies in circulation in the United States before the Civil War. Officials and private banks in the United States also used the Spanish silver dollar as a reserve, and most Americans exchanged banknotes for the Spanish silver dollar.
After the first US Treasury Secretary took office, the US currency adopted the "gold standard". By the outbreak of World War I in 1914, the gold standard system was disintegrated because countries stopped the import and export of gold. In the later period of the gold standard system, the gold content of the US dollar was 1.5466 grams. On January 31, 1934, the gold content of one dollar was set at 13.714 grains (.88671 gram).
The official price of gold increased from $2.67 to $35 per ounce. By 1934, the dollar depreciated, and the American government gradually recovered all kinds of coupons before 1922. The depreciated dollar cannot be cashed, and only foreign central banks can exchange gold for the United States at the official price.
second, the method of identifying the true and false US dollars
1. Handfeel identification: the front and back of the real US dollars are engraved intaglio printing, and the four-corner denomination figures are touched by hand, which has obvious concave and convex feeling, while the fake US dollars are generally not touched by hand. Observing with a magnifying glass, you can see gravure miniature characters.
2. Needle-picking identification: the blank of the real dollar bill contains a tiny red and blue fiber thread, which can be picked out with a needle tip. Some fake dollars have no red and blue fibers, some are only printed with fiber threads that cannot be separated from paper, and some have red and blue fibers in paper. Although they can also be picked out with a needle, the fake fiber threads are made of different materials, and there is no fluorescence reaction when examined under a purple light.
3. Wipe identification: The green emblem and number on the right side of the real dollar ticket will leave a distinct green mark on the paper after being wiped hard on the white paper. Although there are traces after being wiped on the fake dollar, it is not obvious.
4. Texture identification: genuine dollar is a kind of special paper for printing banknotes, which is made of cotton and hemp fibers. The texture is tough and straight, and it can make a snapping sound when you flick it with your hand, while fake dollar has no sound.
5. Color identification: The positive figures, images, characters, laces, etc. of the real dollar are printed with black gravure ink containing magnetic substances, which is bright and eye-catching, while the fake dollar is printed with inferior ink, which has a great contrast with the real dollar.
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