UV coating is refined from special modified resin, special auxiliary materials, or special polymer materials. It is suitable for glass, ceramic tile, metal, melamine board, nylon, PET, PVC, PC, ABS, stone, and other materials. Its main function is to enhance the adhesion of UV printing patterns. It has the properties of fast drying speed, low odor, strong water resistance, and waterproofing. The coating is for materials and inks, one material and one coating, and the performance of UV ink should be considered at the same time. UV coating precautions:   UV coating materials should be of reliable quality as far as possible, and they should be repeatedly tested by the original equipment manufacturers. Different materials use different UV coatings; do not mix them. In humid weather and low temperatures, UV coating needs to be left for a while after spraying, and the effect will be good after it is completely dry. UV coating is to temporarily add a small amount of curing agent according to the needs before use. If a lot of coating is applied at one time, the coating will dry easily, which will cause waste. UV coating is flammable; please stay away from fire. If the UV coating accidentally enters your eyes, please rinse with clean water in time and seek medical attention.   How to use the UV coating for better results:   The coating needs to be “evenly” sprayed or rubbed on the product. Some places cannot be sprayed with the coating, and some places

UV printer surface post-processing process role:   It is the process of post-processing the surface of printed materials, such as paper, by coating with film, special ink, varnish, foil, etc. Post-processing can increase the gloss or partially change the texture, increase the sense of luxury, etc. In addition, functions such as durability and waterproofing can be added. Types of surface treatment processes   1. Laminate (PP, PET)   Adding PP film to the surface of the material after printing can give a smooth feeling and improve its durability. This process is widely used in book covers and magazines.   2. Press coat   Applying thermosetting resin to the printed surface and attaching it to the surface of the material by applying heat and pressure can give a smooth feeling, but the durability is lower than that of the laminate.   3. Varnish  This is a processing method in which varnish is applied from the top after printing ink. Since it can be processed on the same production line as printing, it can reduce costs and shorten delivery time. It can also be processed on-site. The gloss and durability are not as good as those of laminate and press coating, but it can be processed without damaging the texture of the material.   4. Aluminum foil stamping    It shows metallic luster by superimposing “foil” and adhesive on the material and pressing the plate while heating it onto the foil. 5. Relief   In addition to the uv printer itself being

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UV printer UV varnish, also known as UV varnish, is a transparent liquid that can make the pattern present a high-gloss effect on the one hand, and on the other hand, play a protective effect on the pattern, such as waterproof, scratch-resistant, and weather-resistant. Common cleaning types are: Ordinary UVOP varnish   OP varnish refers to a thin varnish applied from the ink roller. It is difficult to improve the gloss due to the thin coating, and it is mainly used to increase the friction resistance of the surface.   Pad UVOP varnish   It is a varnish used to reduce the gloss of the surface, using a mat material to create irregularities on the surface, diffusely reflect light, and exert a matting effect.   Silicone mixed UVOP varnish   It can also be directly bonded to special raw materials such as plastics and inks, and it can be used to protect the surface of UV ink from falling off and raw fabrics through the sliding effect of mixed silicon.   Antistatic UVOP varnish   By applying a varnish containing an antistatic agent on the plastic surface that is usually easy to charge, the surface resistance can be suppressed to the 11th to 12th power of 10. It exerts its power much more than in normal conditions after the raw material is rubbed.   UV varnish   It can form a coating more than five times thicker than real OP varnish, while achieving ultra-gloss not inferior to the film bonding

UV ink is made by ultraviolet radiation of a certain wavelength, through instant photochemical reaction polymerization curing (Ultra-violet Curing), and its curing speed can be adjusted by the type of photoinitiator, the amount used, the strength of the UV lamp, the drying speed, and the number of UV lamps. Because of the ultraviolet radiation, UV ink has the characteristics of fast online drying, and this UV characteristic enables it to be printed on non-paper, such as plastic PVC (Polyvinyl chloride), PET (Polyethylene terephtalate), synthetic paper, etc., and because it can be quickly online dried, reprocessing or flipping and reprinting can be done without waiting, so there is no need to spray powder during drying, even if it is printed on paper, it has higher gloss and friction resistance. Advantages of UV ink: 1. No volatile matter and powder spraying problems. 2. Can improve the quality of the finished product. 3. Save drying time and improve product production efficiency. 4. No need to configure drying equipment, drying space, etc., reducing the demand for production space. 5. Adopting LED ultraviolet light curing, low energy demand, and saving electricity. Disadvantages of UV ink: 1. The price of raw materials is relatively high, 0.7-1 US dollars/㎡ full coverage color printing cost. 2. The cost of an LED curing lamp is relatively high; the better ones are more than 750 US dollars, some are more than 1450 US dollars, and mercury lamps are about 100 US dollars. 3. It is necessary to have better ventilation

The development of UV ink is earlier than that of the UV printer. It can be said that the ink came first, and then the UV printer came. Drying problem: In the past, when there was only single-color or two-color printing, drying and time were not so important, but after 1955, with the prominence of four-color printing presses and the continuous improvement of printing speed, the problems of back printing, sticking, and waiting time for post-processing caused by printing became more prominent. Environmental protection requirements: In 1960, due to the requirements of environmental protection and the requirements of increased productivity, inks with other drying methods were continuously produced. The drying methods include UV, EB, infrared, etc., and ultraviolet drying method became the best choice. Early development: The UV patent was obtained in 1964, and it was truly practical in 1969. However, due to the lack of understanding, it was still difficult to control the use, printing suitability, and post-processing parts, resulting in frequent failures. Mid-term development: In the late 1980s, with the gradual demand for relevant testing technology, various ink factories also actively developed better testing methods. With the emergence of better testing methods, the quality of UV inks has been improved, and the properties of related post-processing have gradually improved. Turning point: In the 1990s, the development of UV inks was focused on high ink film thickness, but due to technical reasons, it has not been overcome. Due to the continuous improvement of the formula, the printing suitability of

One, the composition of UV ink The composition of UV ink is mainly composed of pigment (Pigment), quasi-polymer (Oligomer), monomer (Monomer), photoinitiator (Photoinitiator), sensitizer, and additive (Filler), etc. The traditional oxidant ink is composed of components such as vanillin and solvent. This determines that there are great differences in the characteristics of the two. Two, the characteristics of UV ink Generally speaking, there are 12 points: 1. No need to spray powder. 2. Dries immediately, but needs to be irradiated with an ultraviolet light source to dry. 3. No UV light will form a skin, so there will be no skinning in the ink tank. 4. The ink does not contain solvents. 5. It can print non-absorbent printed materials. 6. The ink film is uniform and has better friction resistance. 7. It will not dry on the printing machine or plate before irradiation. 8. It will change under high temperature and high humidity, and should be stored below 40°C. 9. It cannot be mixed with general ink. 10. Thinners and cleaning agents must be used exclusively for UV and cannot be confused with other cleaning agents. 11. UV ink is not universal for all materials, and its adhesion must be tested individually according to the different properties of the ink. 12. UV is a chemical line, and the wavelength required for ink drying must be close to the UV wavelength, the drying effect cannot be achieved. Three factors affecting the drying of UV ink The length of UV ink drying

Since UV ink printing is done by surface adhesion rather than oxidation or penetration, the amount of surface tension is very important. Since the plastic surface is a non-polar and incompatible interface, even solvent-based inks are difficult to adhere to. In addition, since the additives in the plastic often float to the surface, there may be situations where an actual connection cannot be achieved. There are three types of plastic surface treatment methods: 1. Corona treatment It is an electric shock treatment that uses high voltage and high frequency to generate electric shocks from the ground and the induced air nozzle, respectively. No current passes between them until the voltage reaches 3000-5000 volts/square centimeter. The electric shock molecules are ejected from the air nozzle, carrying high-energy free electrons and accelerating to the positive electrode. This is to change the polarity of the material and increase the surface roughness. The dyne value of the printed material after corona treatment is not the higher the better. The normal dyne value is more suitable when it differs from the ink by about 10. People often ask, why can’t printing be done smoothly when the dyne value is already very high? One of the reasons is that many printed materials contain a lot of additives, and these additives will float to the surface of the material due to high temperature, causing printing failure. The surface tension value of the material treated in this way will gradually decrease with the increase in days, so it

Understanding what is traditional ink? What is UV ink? It is easier to help us choose the printing process of the substrate, which is more reasonable, more effective and less costly. UV ink may be mixed with the UV film commonly used for cards, and there are many professional terms or values ​​on the Internet, making it more difficult for customers to understand the difference between UV ink and traditional ink. The difference between traditional ink and UV ink: Simply put, the biggest difference between the two inks is the drying method and printing method. Traditional ink printing will spray a layer of powder on the paper after printing, so that there is a layer of diaphragm in the middle when the paper overlaps, which prevents the ink from sticking and makes the ink dry faster. Traditional ink printing takes a certain amount of time to dry. If this layer of powder is not sprayed, the ink on the paper will easily stick together, causing the entire print to be ruined. Differences in printing range: If it is printed and sprayed with powder through normal procedures, it will take about a day to completely dry. Of course, some papers will have a shorter drying time. Traditional ink can only be printed on paper, not on plastic or other materials. On the contrary, UV ink can be printed on a wide variety of materials, so the price of UV ink is higher. UV ink drying principle and application: UV printing ink

Usually, when UV printer technicians test the surface effect of patterns printed by newly developed UV inks, they will focus on the following four aspects: surface tension test, adhesion test, drying test, and ink film hardness test. Of course, according to different types of UV inks, flexibility, stretchability, viscosity, and other aspects will also be tested. 1. Surface tension test When using a dyne pen for testing, an intermediate value should be selected as the starting point, such as 38mN/m. During the test, if the test pen wets the surface of the substrate within 2 seconds, the surface tension of the substrate is greater or just the selected value, then a larger value test pen should be selected for the second test, and so on, until the test result shrinks into water droplets (spherical) within 2 seconds, then the value before this test is regarded as the surface energy of the substrate. And use this for comparative analysis. 2. Adhesion test This test mainly measures the adhesion between the ink and the printed material. 3M 610 tape is used as the main testing tool. 3. Dryness test The degree of drying of the ink has a great impact on whether post-processing can be carried out. Since UV printing does not belong to surface penetration drying, if it is not completely dry, its scratch resistance and friction resistance will not be ideal. In terms of ink drying, the quality of drying will be greatly affected by the opacity of the ink,