The so-called gloss of printed products refers to the brightness of printed materials on the surface of the printed products and the contrast relationship between the brightness distribution of the printed materials and the brightness of each direction. The optical properties associated with gloss mainly include surface reflected light and internal reflected light.
Luster and color are collectively referred to as color. Because the colors are more intuitive and have a direct influence on people's mental state, emotions, and many other spiritual aspects, people started to research on color earlier. This research work has basically matured and has been acquired in daily life. A wide range of applications.
The gloss of the print is a sign of the quality assurance of the print
Imprinting and matting is one of the quality marks of printed materials. If it is glossy, it can increase the color of printed imprints; it can enhance the three-dimensional appearance of images, especially the reproduction of physical photographs, which has a glossy and more realistic image. In fact, the relationship between the gloss of ink and the ink is often biased. The more expensive the ink, the brighter the color and the more glossy. There are many aspects of the nature of the ink, the degree of gloss of the ink printed on the paper, and only close to the dry form of the ink, which is often overlooked. There are two kinds of offset printing inks on the market for printing art pictures, color advertisements, calendars, commercial designs, exquisite handicrafts, and book color inserts. The most commonly used are offset inks and fixed inks. Some printing companies, with more than one short-term print, are pursuing ink printing and dryness, and they ask ink suppliers for help. Suppliers do not have in-depth understanding of customer requirements and supply improperly fixed inks. The components of fixed inks are mainly pigments (solids) and binders (liquids). The pigment of the ink shows color, and the gloss of the color is determined by the binder. The ink is printed on the surface of the paper, and the binder oxidizes, polymerizes, and forms a film, which forms a very flat, thin, transparent film of oil. This layer of transparent film, covered in color pigments, so that the paint shiny, this is the gloss of the print. There are many factors that affect the gloss of blotting and they are summarized in the following aspects.
1. The effect of the surface smoothness of the paper on the gloss of the print.
2. The effect of paper absorbency on gloss.
3. The effect of paper gloss on the gloss of prints.
4. The effect of paper strength on the gloss of prints.
5. The effect of paper pH on the gloss of prints.
How should it be measured? The gloss of the blot can be measured with a gloss meter. Most gloss meters measure the specular gloss of printed surfaces. Specular gloss refers to the ratio of the amount of specular light reflected from the surface of the object to the amount of incident light.
If the selected angle of incidence is different when the printed surface of the mobile phone box is measured, the result is also different. The larger the incident angle, the greater the specular reflectance and the higher the gloss; vice versa. It can be seen that the height of the Zebra depends not only on the surface characteristics of the object, but also on the measurement angle. There is no universal standard for what kind of angle measurement is appropriate. Generally, a high angle is adopted for a high-gloss surface, such as 45 degrees; for a low-gloss surface, larger angles, such as 60 degrees and 75 degrees, are measured. At present, the measuring angles of many glossmeters are adjustable for arbitrary selection.