Difference of watermark UV ink sample and standard sample

Luster can be measured with the instrument, but it can also be judged by the naked eye, usually only by visual observation during the color matching process. Luster actually refers to the degree of the ability of an ink printed sample to reflect light in the same direction after being irradiated with light. Its direct influence on the appearance of prints is a very important indicator. At the same time, when selecting the ink, it is necessary to distinguish whether the ink itself is bright, semi-glossy or matte type ink, to avoid mixing errors.

Hue is the basic characteristic of color and is used for qualitative differences. When matching colors, the first thing to consider is whether the hue is the same, and the detection method is usually to scrape the paper by scraping or analog printing, with the person's eyes to compare the standard samples and samples.

Hiding power is the degree to which the ink covers its background. The better the hiding power is, the worse the transparency is, and the level of transparency affects the efficiency of the ink trapping and the degree of influence of the printed substrate. Coloring power is a method of expressing the concentration of ink. The measurement is based on a certain amount of ink and then adding a certain amount of standard white ink to dilute and then compare with the standard sample. The difference in color strength reflects the degree of mixing of the ink and affects the thickness of the printing ink film.