The Resolution and Colour Harmony of inkjet printer

Resolution

DPI is an important standard to measure printing quality in the industry. It itself represents the number of printable points in an inch range for inkjet printers. The higher the DPI value, the better the printing effect. The situation of color printing is more complex. Usually, the quality of printing is affected by both DPI value and color harmonic ability. Since the resolution of black-and-white printing of general color inkjet printers may differ from that of color printing, it is important to pay attention to the resolution that the merchant tells you and whether it is the highest resolution. Inkjet printers with a minimum of 360DPI should be selected.

Colour Harmony

For users who use color inkjet printers, the printer's color harmony ability is a very important indicator. Traditional inkjet printers, when printing color photographs, encounter transitional colors, will choose a close combination among the three basic color combinations to print. Even with black, this combination can not exceed 16, and the ability to express the color order is unsatisfactory.

In order to solve this problem, the early inkjet printers used the method of adjusting the density of the spray point to express the color order. But for the products with color resolution of about 300 dpi at that time, the result of adjusting the density is that the effect of transition color is very poor, and there will be many spots. Color inkjet printers, on the one hand, improve the printing density (resolution) to make the print points thinner, so that the map becomes more delicate; on the other hand, they are improving the technology of color harmony. Common methods are: increasing the number of colors, changing the size of ink droplets, reducing the basic color concentration of cartridges and so on. Increasing the number of colours is the most effective. Usually five-color ink cartridges are used, together with the original black ink cartridges, to form the so-called six-color printing. In this way, the number of color combinations obtained by arrangement and combination is increased many times at once, and the effect is naturally very obvious.

The principle of changing the size of jet ink droplets is to spray standard size ink droplets where the color concentration is high in printing, while spraying small ink droplets where the color concentration is low also achieves more color levels. Reducing the color concentration of ink cartridges is to use repeated inkjet method to form more color levels in high color concentration areas.