You Really Know Grayscale Printing?

Users who are new to the inkjet printing industry can easily confuse the concept of grayscale printing and mistake it for single-gray printing.

(@Printing Assistant)

In jet printing, it is precisely the variable point technology. Before the variable dot technology, the print head can only eject a fixed-size ink dot. In the case of processing the transition color of the image, it can only express the light-colored part by extracting the dots. The visual effect of the light-colored part of the image is like pockmark. Same, all you see are ink dots. With the variable dot technology, the part of the image that needs to be transitioned is covered with small ink droplets, and the ink dots per unit area are not less, but because the ink dots are small, the transition from dark to light can be seen.

So how does the print head control the ink droplet size? In fact, the nozzle does not have several nozzle holes of different sizes at the same time, but is combined into a larger ink dot after multiple consecutive jets through a nozzle hole. For example, 1 shot is a small spot, 2 shots are a midpoint, and 3 shots are a big spot. Of course, different nozzles can combine to produce more ink dot sizes, which we call several levels of gray.