Types and characteristics of the most popular scre

2022-08-01
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Types and characteristics of screen printing mirror ink

mirror photochromic ink is a kind of mirror ink with special effect. The ink is printed on transparent plastic material (back) and uses the principle of light interference on the front. The color of the ink changes with the change of viewing angle, playing the role of laser effect. Printing in a variety of substrate materials can get a unique sense of color and advanced sense. In recent years, more and more commodities are printed with specular photochromic ink, such as buttons of communication devices, panels of electronic products, and plastic signs, which adapt to the development of green buildings and building industrialization, and are deeply welcomed by users, and improve the value and selling points of silk screen printing commodities. However, compared with ordinary printing inks, this kind of specular photochromic ink requires a high degree of printing technology and skills Storage and precautions are briefly described as follows, hoping to be helpful to the use of mirror ink:

1. Types of mirror ink:

the technical indicators of materials in foreign automobile enterprises are also adopting their own standard systems and standards

ordinary mirror ink (silver and metal color) and mirror light color changing ink. At present, common mirror ink is widely used, such as IMD technology used in buttons, operating panels of washing machines, function indicator panels and signs on microwave ovens, and decorative parts on electronic products; The use of mirror light color changing ink is more decorative than ordinary mirror ink, making the product more beautiful

2. The substrate used in the surface ink is mainly several transparent sheets, and they are printed on the back (back), and the effect can be seen from the front

the transparent sheets used include PC (polycarbonate), PMMA (acrylic or plexiglass), hard PVC (polyvinyl chloride) and treated pet (polyester)

mirror ink has adhesion to the above transparent sheets, and can obtain mirror and mirror discoloration effects. However, it is worth noting that some of the finished products of PC or PMMA cannot get good mirror or mirror change effect due to poor solvent resistance due to different materials and processing technologies. Therefore, small sample test must be conducted before use to confirm before production

in addition, in order to obtain the mirror effect, in addition to the above, since the mirror ink is composed of special aluminum powder pigments and a small amount of resin and other basic materials, and the aluminum powder pigments are flakes, which are arranged in parallel on the surface to obtain the mirror reflection performance, the materials with poor surface smoothness (substrate) and the materials that cannot resist the solvent in the ink will not get a good mirror effect

3. Characteristics of screen printing mirror ink:

(1) in addition to a small amount of resin and flake aluminum pigment, the solvent accounts for a large proportion of the mirror ink, so the viscosity of the mirror ink is very low. Do not use an inclined version during screen printing, otherwise it will flow badly. Therefore, whether manual or machine printing, parallel lifting version should be used to make the ink as thin as water always fill the version, Avoid or reduce blocking that may affect normal silk screen printing

(generally, the range of the hydraulic universal testing machine can be divided into 100kN, 300KN, 600kN, 1000KN, 2000kN and 3000kn2) if the silk screen printing machine is selected for printing, the metal ink return scraper should be changed to the rubber ink return scraper to make the ink evenly coated on the plate

(3) during the mirror ink screen printing, the coating range should be controlled to be close to the printing area of the effective picture and text as far as possible. Otherwise, due to the large coating area, the solvent in the mirror ink is fast, and due to the lack of effective supervision and management, it can not be printed continuously

(4) the mirror ink volatilizes quickly in the upper solvent. In order to prevent blocking, it is necessary to ensure continuous printing while paying attention not to allow the flowing air to dry the plate

(5) if the thickness of the ink film is too thick, there will be peeling between the aluminum pigments in the ink. Therefore, it is recommended that the ink be printed as thin as possible, and note that the mirror ink cannot be overlapped

(6) the mirror ink itself has no good shielding performance. In order to obtain a good mirror and its color changing effect, a layer of covering ink must be printed. This kind of printing ink should be the ink that adheres well to the mirror and the color changing mirror ink without solvent erosion

mirror ink is a high-grade decorative ink, which is as thin as water, and is very volatile during silk screen printing. If the printing environment is poor and the printing technology is not in place, there will be an increase in blocking and wiping times during printing, and it will also cause uneven ink layer on the substrate. At present, the units that have used the mirror ink have improved the printing conditions of the ink and mastered the silk screen printing skills, which have been mass produced. The original intention of the author of this article is to give readers some help and get more communication at the same time

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