What are the three primary colors?

Three primary colors refer to the three basic colors that can no longer be decomposed in color. The three primary colors we usually refer to are color three primary colors and optical three primary colors. Optical three primary colors (RGB): red, green, blue [6]. After the optical three primary colors are mixed, the display screen is composed of colors. The three primary colors are added to white at the same time, and white is one of the colorless systems (black, white and gray).

water-based pen contamination to clothes can be wiped with alcohol, alcohol can dissolve the ink components in the water-based pen. You can also use gasoline to wipe, the composition of gasoline can effectively remove the residue of water-based pen on clothes. Baking soda and vinegar can also have a better cleaning effect. Sprinkle baking soda at the place where the handwriting is stained, and then pour white vinegar.