Introduction of digital inkjet

Definition:

Ink drop coverage:

Ink droplet coverage is simply the coverage of ink droplets on the medium.

1. Inkjet speed: Inkjet speed refers to the speed at which the ink is ejected from the nozzle, and printing frequency can also be used to describe the faster inkjet speed, which can make the inkjet still remain when there is a large distance between the nozzle and the medium. There is good accuracy. Slow inkjet speed or varying inkjet speed will cause image blur.

2. Ink drop volume: The ink drop volume refers to the size of the ink drop. The uniformity of ink droplet size is very important for outputting true and accurate images. The uneven ink droplet size will result in poor quality images, usually streaks.

3. Inkjet accuracy: Inkjet accuracy refers to the ability of the nozzle to accurately eject ink in a specified direction. In addition to being affected by the uncontrollable mechanical errors of the print head, the system's ability to accurately eject ink depends on the ink ejection accuracy of the print head. Poor ink jet accuracy can cause banding or blurred images.

4. The uniformity of inkjet: It is composed of the above three factors. Each factor has positive and negative effects on image quality due to its size and degree of change. Full control of these three factors is very important. Each factor will change with the change of printing frequency or duty cycle. Printing frequency refers to the repetition frequency of ink ejection, that is, the movement speed of the print head carriage in the scanning direction multiplied by the resolution of the scanning direction. Duty cycle refers to the average ejection time relative to the idle time in a period of time.

Insufficient inkjet accuracy, low or unstable inkjet speed, and unstable inkjet volume are all causes of poor print image quality.