1. In principle, the sample is compared with the standard sample by side-by-side scraping method to check whether the color of the sample conforms to the standard sample. 2. Tools and materials (1) taper steel body with wood handle of ink mixing knife, 200 mm long, 20 mm wide and 8 mm narrowest. (2) The blade is made of stainless steel, 92mm × 59mm × 0.5mm, and its edge is bent outward by 25 ° at 9mm. (3) Glass plate 200 mm × 200 mm × 5 mm. (4) The size of the paper is 110mm × 65mm, and there is a 5mm wide black solid bottom bar 60-65mm below the top. (5) Cellophane 65 mm × 30 mm. 3. Test condition (1) the test should be carried out at the temperature of (25 ± 1) ℃ and relative humidity of 65 ± 5. (2) The surface color and color light should be inspected under the standard illuminator with an incidence angle of 45 °± 5 °. (3) When examining the background color, the scraping sample should be fluoroscopic. 4. Test step (1) take 5g of standard sample and sample with inking knife, put them on glass plate and mix them evenly. (2) Take about 0.5g sample with a mixing knife and apply it to the top left of the scraping paper, and then apply about 0.5g sample to the upper right of the scraping paper. The two should be adjacent and not connected. (3) Place the blade above the coated ink sample so that the main part of the blade is 90 ° to the sample paper. Scrape the ink into a thin layer on the scraping paper from top to bottom, and reduce the force when it reaches 15mm below the black bar. The inside angle of the blade is about 25 ° so that the ink is coated on the paper with a thick ink layer. The final scrape shape should be similar to figure 13-1. (4) The thin ink layer on the scraping paper is called the face color; the ink progressive layer at the bottom of the scraping paper is called ink color; the ink thin layer on the scraping paper is called the background color for light perspective. (5) After the ink color inspection, cover the cellophane on the thick ink layer. 5. Test results (1) lithographic ink and relief ink focus on whether the surface color and background color of the sample are similar to and consistent with the standard sample. (2) Screen printing ink and gravure ink for paper mainly inspect whether the surface color of the sample is similar to and consistent with the standard sample. (3) The test results should be based on the face color and background color observed within 5 minutes after scraping, and the ink color is for reference.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.