Digital printing equipment toning skills sharing

Digital printing equipmentAfter digital skills, the expected pattern and color are printed. Digital printing equipment printing is used for printing and proofing and small batch production, which is convenient and cost-saving, and mainly saves the process and cost of plate making and screen making. It uses reactive/acid dyes for printing. In most cases, six-color inks such as black, cyan, magenta, yellow, blue and orange are selected. The key practical skills in the proofing and production of digital printing are embodied in color, graphics and color fastness. The embodiment of the pattern can be achieved through color separation and planning software, and the color can be completed through the use of several different toning methods.

The same type of digital printing equipment, the same type of ink, sprayed on the same fabric material, even if the same digital printing machine is used, the color of the painted pictures will be different. This requires color management and software systems. The useful application of this system is at the center of the excellent quality of the new digital printing.

thus. Promote us to deal with several difficult toning problems in digital printing inkjet printing, namely:
(1) The screen display method is well known that sunlight consists of seven colors of light, red, orange, yellow, green, blue, and purple. When the light shines on the surface of an object, the object absorbs some monochromatic light in the sunlight, and the remaining light Reflected by the object into the human eye, through the retina and optic nerve, etc., it is transmitted to the brain to distinguish the color. That is, the color of the object we see is the color of the reflected light. In the meantime, red (R), green (G), blue (B) In a special position in the spectrum, they can compose other kinds of color light, and the human optic nerve has three senses: red, green and blue, so red (R), green (G), blue (( B) It is called the three primary colors of shade.

The display method of digital printing equipment screen is to adjust the color of the picture by adjusting the color displayed on the screen, usually through the color menu on the screen to select or adjust the color. This method is very useful in color matching or initial color matching, and is a color matching method commonly used by planners. However, because the color development principle of the fluorescent screen is different from the color development principle of the dye on the fabric (the fluorescent screen produces color through the mixing of three RGB electron beams, and the dye reflects the color by absorbing light waves of certain colors), on the screen The colors that can be displayed cannot be fully reflected on the fabric through dyes, and the subtle differences between the colors reflected by the dyes cannot be clearly displayed on the screen. Therefore, this is a rough color toning method and cannot be used for accurate color matching.

(two)T-shirt printing machineColor chart
Color card to control the color of the picture is a simple, intuitive and useful way. First of all, prepare some color cards to be printed on the fabric. Use the color of the color card as the standard. After comparing the colors between the original color card and the color card, select a color similar to the color card to replace the original color, and print the color on the fabric. The color blocks are compared with the original, and then adjusted and printed. Commonly used color cards in the world include RGB color cards, CMYK color cards, Lab color cards and PANTONE color cards.

Compare the color sampled by the customer with the color card. The T-shirt printing machine finds the color code in the color card that is the same as or close to the color of the picture, records the corresponding value or number, and transmits the color value in the graphics software to adjust the image colour.

(3) Color measurement method
The T-shirt printing machine uses a color measuring instrument to measure the color of the target color block, and transfers the measured results to the PC and then prints the colors. This method uses instruments to determine the color, thus removing a lot of man-made and environmental elements. When using this method, the sensitivity and accuracy of the color meter itself have a great impact on the measurement results; and the measurement results are not accurate, which will directly affect the printing effect.

On the other hand, the texture of the fabric will also affect the accuracy of the color measurement instrument, because the uneven surface of the fabric will reflect the light from different viewpoints, and then reduce the brightness and saturation of the measurement results, making the printed color darker than the original. The color measurement method is most suitable for colors with higher saturation. It is not only convenient to use, but also accurate.

(4) Experience the color mixing method

The speed of the color process and the accuracy of the results are completely dependent on the experience of the operator. The operator is required to continuously analyze, recall and stack in the usual work. In the process of stacking, it is necessary to continuously stack materials, and paste and label the adjusted colors for use when needed. Digital printing experience color mixing method is similar to traditional printing experience color mixing method, but T-shirt printing machine is easier to grasp than traditional printing color mixing method. Because in addition to relying on the materials that are usually piled up, it can also rely on the screen. The screen has always been able to provide similar color appearance, but as mentioned above, the screen appearance is different from the color development mechanism of dyes on the fabric. Sometimes the colors are very different and misleading, which brings difficulties to color matching.

(5) Central color method

The color method in the center is used in conjunction with other color methods. When using color chart method or color measurement method to measure the target color block, due to the limitation of the number of color cards or the difference of the fabric, and the accuracy of the color measuring instrument, the result color and target color may be certain. The color difference. The central color method takes a base color as the center, takes two weights of the color as variables, and radiates to the surroundings within a certain scale according to a certain scale, and arranges them into a central color table.

The center color of the center color table is the result color obtained by the color chart method or color measurement method. The T-shirt printing machine is close to the target color, but there is a color difference. After two variables are gradually changed within a certain scale, a color group that changes suddenly within a certain scale is obtained, and it is not difficult to find a color block with the same color as the target color. The center color method has a relatively high toning accuracy, but it depends on the accuracy of the center color. The T-shirt printing machine must be close to the target color. At the same time, it also requires the operator to know the direction of the color error between the center color and the target color. A correct judgment.