As grayscale printhead technology develops into a viable solution for production-grade inkjet printers, its compact variable ink drop grayscale printing is a critical method for the printing industry to judge print quality. The measurement of the spatial resolution of dots per inch (dpi) is only to detect the amount of ink droplets related to single or binary system. The reason why the sharp resolution will become the latest standard for judging print quality is why it is more accurate to judge the details of a picture with the two eyes than the physical judgment.
Use light tones to improve print quality
The use of light tones is a way for users to perceive that the printed matter has a higher resolution than its original document. In particular, light tones make the details of the image look thinner and lighter, reducing the graininess of skin texture. Light tones are usually 40% of the density of heavy tones. Therefore, when you are printing a 40% blue color, the printer will use light blue close to 100% instead of the usual blue with 40% coverage. Although it will consume more ink, the lighter colors bring a beautiful picture and smooth color filling. In comparison, the resolution is obviously increased to 1.5 times the original. A picture is printed at a resolution of 600 * 360dpi, and the average resolution is 464dpi. By using light tones, the resolution is close to 700dpi. Similarly, a 1000 * 720 dpi screen uses light tones to achieve a resolution of 1200 dpi.
Use variable ink drop grayscale printing technology to obtain excellent image quality
Using variable ink droplet size (variable ink droplet gray-scale printing) in the same print screen is a remarkable technique for improving image quality. When the size of the ink droplets becomes smaller, the eyes perceive as a continuous tone and the color becomes lighter until it disappears, similar to the photo effect.
This technique consumes less ink than using lighter tones. The true variable ink drop grayscale printhead can produce different amounts of ink drops as needed. Through the RIP process, you can define the appropriate droplet size for a specific image. For example, when outputting smaller and finer text, small-size ink droplets can be used. For skin tone that requires a smooth transition, medium-sized ink droplets are ideal. For areas of high ink density or large areas of solid color fill, you can choose larger sizes of ink droplets. Grayscale presents flawless skin tone, smoother shadows and gradation effects, sharp appearance, small and clear text, and intricate detailed appearance.
With more gray levels, it will bring smoother color transition and more detailed details. Although the gray levels provided by each manufacturer are different (the number of variable ink droplet sizes), the overall print quality of variable ink droplet grayscale is close to the photo quality, even when using light tones To exceed its own image quality. You will also gain additional advantages from it, because you will define different amounts of ink droplets according to specific requirements during the printing process, from which you will obtain continuous and stable high quality.
Save costs when printing with variable ink drops
As mentioned earlier, using light tones not only makes the image smoother and higher, but also significantly improves the resolution of the printed matter, and the price paid is to use a lot of ink. In contrast, variable-ink-drop grayscale printing fills light-colored areas with small-sized ink dots. Compared with light-colored large-area filling, it saves ink. The ink saved by four-color printing using variable ink drop gray-scale technology is relative to the four-color binary ink drop printer and the six-color printer using light tones. Saving ink will vary depending on the printer's ability to drop different ink droplet sizes, but the six-color EFI VUTEkQS2 Pro printer with grayscale printing technology, conservatively speaking, saves 15-25% of ink. Compared to the binary mode, the EFI four-color and eight-color VUTEk GS Pro series hybrid dual-purpose printers save 20-30% ink.
At a critical moment in image quality: grayscale printing and light tones
When image quality becomes a crucial factor for customer satisfaction, the VUTEk QS2 Pro printer has both variable ink drop grayscale printing and two light-tone (CMYK, LC, LM six-color printing) functions for additional Smoothness and continuous tuning require more gray levels. With further improvement, the four-color light tone and variable ink droplets are printed on the eight-color VUTEk GS Pro series printers, and the image quality will be further improved. These examples are not meant to emphasize that you benefit from low-volume inks, but that the final print quality can meet the stringent needs of your customers.
The latest standards
For the comparison of inkjet technology again and again, the true resolution per inch of dots can be accurately listed at a certain time in the future. It is indeed not easy to change the method of measuring the final print quality of the entire industry. However, what is important to us is that compared to dpi, we began to tell print buyers that they use sharp resolution as the latest method of measuring the final print quality. After all, the "beauty" that you see in your eyes is really true. As the saying goes, "seeing is believing".
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