Technical analysis of textile overlay printing

2. Three elements of color: The main significance of hue, lightness, and purity is to use a small amount of hue to form more hue; lightness: the degree of color, the brightness of the dye after the drop in color, printing paint cover printing paste contains Titanium dioxide, after the stacking with the background color increases, the significance of the brightness in the overlay printing is to enhance the layering of the printing; Purity: the saturation of the color, the higher the purity, the brighter the color, the more the color stacking, the more the purity Low, superimposed color printing on the purity of the grasp, should be conducive to the vividness of the picture.

3. The deployment and use of primary colors of printed color: In theory, magenta, cyan, and yellow are the three primary colors of dyes, which are the basis of all dye mixing. Most dyes and coatings commonly used in actual printing do not have the three primary colors in strict sense. Usually, Similar red, yellow, blue, but their superposition of color produces a range of colors less than magenta, yellow, and cyan, the brightness of the paint shades is better than the activity and dispersion; between the two dyes close to the primary color shade, said Secondary colors, such as orange, green, and purple; in stacked prints, if dark is printed first, it penetrates inside the fabric and the color light tends to be dark when the color is superimposed; if it is light-colored, the color is superimposed. Tend to light color; complex color: the color containing three primary dyes is called the complex color, which is the third color, and the three primary colors are mixed in equal amounts to obtain the grayish black with the minimum brightness. When the color is not equal, different complex colors can be obtained, and the color light tends to have a large proportion. In the primary colors, the coffee, dark green, earth red, and various shades of gray in the multicolor printing are laminated one at a time;

4. The color printing method of stacked printing The three methods of solid color overprinting, dot overprinting, solid color, and dot-over-overprinting are coating, activity, and dispersion. They exhibit the law of color subtractive color and the hiding power of the coating is higher than the activity. Decentralized, shaded on the post-printing, and the active dispersion of the first printing is easy to penetrate the fabric inside, after the accumulation of printed fabric surface, easy to wash away soaping, so emphasis on the first printing of the color paste; cover printing due to the presence of titanium dioxide , Coverage, can only be overprinting network, the color is the color point juxtaposed color, the tendency of shade depends on the ratio of the dot color and background color. The active, disperse, and overprinting of the dots of the paint is the dual result of color transmission and coloration. Solid color overprint: The color block presses the color block, and the background color produces a third color through the overlap color. Overprinting: Overprinting of moire, flat dot overprinting, moiré and smooth dots combined with overprinting; Overprinting of moiré: Overprinting of same-colored overprinting: Overexpression of the shades of color is used to express the level of over-expression. The style of performance is more than a moiré pattern. Rich and thick layers; moire overprint of different hue is the main content of moire. This method is used in printing to realize the multicolor effect of overprinting, and the color is more abundant; the flat dot overprinting is a uniform dot overprint, for example, 30% uniform dot is printed in red, and it is light red when viewed on bleached cloth. After embossing the dots with 30% yellow uniform dots, they are light orange, and so on. Other flat-screen dots of various colors are overprinted to create more third colors, but the fabric is not as clear and colorful as paper.

5. Overprinting of solid colors and dots: Active, disperse, overprinting of moiré and solid colors of the coating mostly presses light-colored patches on dark moiré, and the shroud prints on shallower backgrounds. Moire, its rich spot color real-printed levels and color changes.

6. Color-printing color printing screen: solid color overprinting: the coloring area is larger than the coloring area shrinking 1~2 lines; the fine cloth shrinks 1~2 lines than the coarse cloth; the same pattern, activity, dispersion relative coating shrinkage 1~ 2 line, because the coating is less than the first two; store overprinting: moire overprint: the effect of moiré overprint depends on the choice and control of color screening; moire printing has two rules and no rules, dot shape, Screening angle, screen gray scale, and screen number are the basic elements of regular screening. The shape of dots is preferably a dot, the number of screen meshes is high, the number of screens can be high, and the coating is relatively low.