Solution to chromatic aberration in cotton direct injection
Cotton direct injectionCompared with traditional silk-screen printing and other processes, the process has been simplified a lot, but there are still links such as drawing, retouching, mapping, setting curves, etc., to complete the whole process. Because different digital printing machines have certain technical limitations and environmental factors, which affect the quality of digital clothing printing, what are the factors that produce color difference?
The objective existence is: due to the limitation of many aspects in actual production, the color error cannot be completely eliminated, and the color quality difference can only be controlled within a reasonable color standard through adjustment.
1. The color of the digital printing is different from the computer monitor
Computer monitors will cause different viewing angles of colors due to different brands, models, and individual color values. It is based on that the display uses RGB color light to form images, while the printed matter is toned in CMYK four colors. The two principles are very different, which will cause serious color difference between the screen display color and the printed product. You must not use the screen color to proofread the color.
two,Garment printing machineEnvironmental factors
Environmental factors will also affect the difference in printing colors, printing time, digital printing ink quality, temperature, humidity, material characteristics, etc., factors that cannot be controlled by humans will also affect the difference in printing colors.
Third, the color value problem
When making the color, the color value of the lightest color should not be lower than 8%, otherwise it may not be printed.
Do not use four-color black or four-color gray, as it will show serious color difference after printing.
The color of the picture on the design manuscript is RBG, not CMYK;
Avoid using special colors. When the picture is a gallery purchased from other places, or materials provided from other places, sometimes there is a description file with a special color hidden but not found, causing all the color of the overall printing color to change. This color difference will result It is the overall overall color difference.
Fourth, the material characteristics will also affect the chromatic aberration
Each material has different characteristics such as background color and ink absorption. If you can grasp the characteristics of the material, the color will be more comfortable in the design. The darker the background, the more likely to produce color difference.
In addition, there are several points of color difference caused by the operation of the digital printing machine itself:
1. The ink supply system of the clothing digital printing machine is unstable (especially the ink level of the ink cartridge)
The liquid level of the ink cartridge greatly affects the ink supply power of the print head and directly affects the printing effect. The color when the liquid level is high is darker than the color when the liquid level is low, which leads to the color difference of the picture;
2. The working voltage of the print head of the digital printing machine is unstable or the voltage changes during the printing process
The working voltage of the print head directly affects the ejection strength of ink droplets (especially the piezoelectric print head), and from the overall visual effect, there will be different shades and different definitions. Therefore, before printing out, the print head voltage should be set to normal (usually adjusted in the software), and the input end of the printer should be connected to a voltage regulator.
3. Other processing has been done during the printing process
Other processing may include changing media (largely stitched pictures), changing ink or filling different types of ink during printing, too long pauses or too frequent pauses during printing. The above operations may cause the picture to be discontinuous and the picture output has color difference.
In order to avoid the above situation, we need to check whether the media and ink are sufficient before printing. If problems are found, they need to be supplemented in time. It should be noted that for the clothing digital printing machine with heating and drying device, the pause time is too long. The color difference of the several PASS images printed before and after the pause is very different;
Five, the same picture, different machines or under different conditions to complete the printing (mainly for large pictures that need to be spliced) even the same model of different digital printing machines, the printing effect (color difference) has different differences, After printing and stitching, there is color difference on the whole. Therefore, if there are pictures that need to be spliced, try to use the same clothing digital printing machine to print under the same conditions to maintain the overall effect and continuity
6. Unstable negative pressure
For printers that use the principle of negative pressure to supply ink, the negative pressure is unstable, which directly affects the ink supply pressure of the print head, which in turn affects the inkjet effect of the print head;
Seven,Treadmill printing machinePaste, caused by frequent cleaning of the print head
If the print head is cleaned frequently for faults such as paste head and ink broken, it will cause color difference and discontinuous picture effect on the screen. Because the effect will be quite different before and after the print head is cleaned, we recommend that you check the working condition of the digital printing machine before printing to ensure that it is correct before production. Secondly, you need to purchase quality when selecting ink Excellent, guaranteed quality ink.