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 in color between different versions; In addition, 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 Minister of Finance, and different release years are different ministries of finance.
Extended data:
XTT dollar bills are made of cotton fiber and hemp. Long cotton fiber makes paper not easy to break, good ink absorption and not easy to fade. Hemp fiber is tough, which makes the paper stiff for a long time and has certain resistance to water, oil and some chemicals. One-dollar paper is white without whitening agent and does not reflect light under purple light.
In addition, the US dollar bill will display black and green according to the light angle. The main pattern of the dollar is engraved intaglio printing, and the library printing and serial number are embossed printing. After version 1990, there are micro characters around the portrait window below.
Magnetic substances are added to the ink, and the magnetic real US dollar bill is specially made with special ink such as fluorescent ink and magnetic ink, so the green emblem and green number on the right side of the front of the US dollar bill will leave a "green mark" on the paper after being wiped hard.