Because dollar green is an ink made of tree juice, the quality of tree juice is different every time, so the color is slightly different. The signature above is the signature of the finance minister, and different release years are different finance ministers.
Before the 20th century, 1, 5, 10, 25,50-cent banknotes were issued. Compared with the small front-page dollar, the big front-page dollar has increased by half. Interestingly, all denominations of dollars are the same size. At present, the US$ 20 is the most widely used high-value banknote in the United States, and the US$ 50 100 is very rare in the circulation market.
Extended data:
Identification method
1. Handfeel identification: Gravure printing is engraved on the front and back of the genuine element. Touching the four-corner denomination figures by hand has obvious concave-convex feeling, while the fake element generally does not need to be touched by hand. Observing with a magnifying glass, you can see gravure miniature characters.
2. Needle-picking identification: the blank of the real dollar face contains tiny red and blue fiber filaments, which can be picked out with the needle tip. Some counterfeit money has no red and blue fibers, some only print fiber filaments that cannot be separated from paper, and some paper has red and blue fibers. Although they can also be picked out with a needle, the pseudofilaments are made of different materials and have no fluorescence reaction when examined under purple light.
3. Wipe identification: The green emblem and numbers on the right side of the genuine yuan ticket will leave obvious green marks on the paper after being wiped hard on the white paper. Although there are traces after rubbing on fake dollars, they are not obvious.
4. Texture identification: Zhenyuan is a special paper for printing banknotes, made of cotton and linen fibers. The texture is tough and straight, and it can make a snapping sound with a flick of the hand, while the fake dollar has no sound.
Baidu Encyclopedia-USD