1792 appeared after the passage of the American mint act. At present, the issuance of US dollars is controlled by the Federal Reserve system. Starting from 19 13, the United States established the federal reserve system and issued federal reserve bonds. More than 99% of the banknotes in circulation are federal reserve notes.
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The main scene pattern on the front of the US dollar bill is a person's head, and the main color is black. The main landscape pattern on the back is architecture, and the main color is green, but there is little difference between different versions, such as the back of 1934 is dark green, the back of 1950 is grass green, and the back of 1963 is dark green.
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 is half the size of the small front page dollar. Interestingly, all denominations of dollars are the same size, and $20 is the most used high-denomination banknote in the United States.