For users who use color inkjet printers, the printer's color tuning capability is a very important indicator. Traditional ink jet printers, when printing color photos, encounter a transitional color and will select a close combination of three basic color combinations for printing. Even if black is added, the combination cannot exceed 16 in general. The ability to express color levels is unsatisfactory.
In order to solve this problem, early ink jet printers also used a method of adjusting the density of spray dots to express the color gradation. However, for a product with a color resolution of only about 300 dpi at the time, the result of adjustment of the degree of density was a poor effect in the transitional color, and there appeared to be a lot of spots.
Today's color inkjet printers, on the one hand, make the printed dots finer by increasing the printing density (resolution), which makes the images more delicate; on the other hand, they all improve the technology in terms of color harmonization. : Increase the number of colors, change the size of the ink droplets emitted, and reduce the basic color density of the ink cartridge. Several methods are used to increase the number of colors.
The principle of changing the size of the ejected ink droplets is to use standard size ink droplets where high color density is required in printing, and to spray small droplets where color density is lower, and also achieve more color levels. . Reducing the color density of ink cartridges is actually using a repeated ink jet method to create more color gradations at high color density.