Guangdong Huaping Hygiene Material Industrial Co.,Ltd. main products include printing film,PE breathable film,PE perforated film,Multicolor printed film,Nonwoven Laminated film,Anti-counterfeiting Holographic film etc .
① On a flat glass color viewing platform, take the standard sample and the coloring sample at a distance of 1 to 2 cm.
② Take the scraping paper and spread it on the glass stand, then take the toner, scrape the sample with a glass stick, and compare the results. The comparison of color sample results involves two important factors:
① Hiding power. The degree to which the ink covers its base color, the better the hiding power, the worse the transparency. Transparency High and low shadow II The efficiency of ink registration and the degree of influence by the printing substrate. Generally, the hiding power of dark ink is stronger than that of light color. For example, blue is better than light yellow, and the covering power of the ink is closely related to the factors of the ink itself, such as the thickness factor. Usually, the covering power of white ink is related to the particle size of titanium dioxide. Poor printing strength, easy to agglomerate printing; fine particles, good hiding power, uniform surface, smooth and delicate. The diameter of white ink is generally required to be no more than 15 μm, and the diameter of other color inks should not exceed 12 μm.
② Tinting power. A method to indicate the level of ink concentration. Its determination is to take a certain amount of colored ink, mix it with a certain amount of standard white ink, and then compare it with the standard sample. The strength of the tinting strength reflects the degree of mixing color of the ink. Through color identification (color scraping paper scraping test), the differences in gloss, hue, and hiding power between the ink sample and the standard sample can be compared. The specific method is as follows: put the standard ink in the upper left corner of the scraping paper, and put the matching ink in the upper right corner. Use the scraper to flatten the standard and color matching inks to be compared at an angle nearly perpendicular to the scraping paper. After the ink surface is dry, judge the difference in gloss between the two under a certain light source and observe the appearance of the entire color. Usually black and colored inks use white scraping paper, while white inks use black scraping paper. When observing color samples, it is best to compare them under the indirect light source indoors during the day, and should not be exposed to direct sunlight. It is recommended to use when observing at night: “color price fluorescent tube and color temperature 5000~200. K. You can also use self-made mixed light sources: 2 blue fluorescent tubes, 3 6500K400W fluorescent tubes, 6 100W tungsten lamps, and fix them on the Just put it in a special cover, it is mainly convenient to observe the color sample.”
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