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Plastic, paper and metal inks
Plastic, paper, and metallic inks can be used for advertising and industrial printing. The monomeric polymer acts like a solvent, acting as a transfer and providing the necessary tackiness for printing. One-component inks consist of a thermosetting resin. The ink must be baked and not dried naturally.
Nitrated varnishes, ceramics, plexiglass, epoxy, and UV inks can all be used on metals, but inks should be selected based on external weather resistance, chemical resistance, abrasion resistance, and molding requirements. The ink is printed after adding thinner or drying agent, and the leveling property is good. Exposure to UV light can be protected by surface varnishes when it will fade.
Solvent-based, waterborne, and uv inks have metallic inks. The metallic effect is good on glass and vinyl substrates, but exposure to moisture in the air is prone to oxidation. Water-reduced uv inks require lower uv energy than conventional high solids uv inks. Resistant to stamping and forming.
Gold metallic color is not recommended for outdoor exposure due to reduced metal surface effects.
In order to help select the right printing ink for different substrates, the following features of the following commonly used inks are described as follows:
Uv ink
In the past 10 years, uv compounds have had a tremendous impact on the visual media market. Volatile inks can be used for printing such as plexiglass, acetate, butyrate, digested cotton, polyvinyl chloride materials. If the factory does not have 60 feet of gas drying equipment, 8-10 feet of gas drying equipment can be used instead to produce more economical. However, it should be noted that epoxy-type solvents do not affect the shelf life.
Thermosetting inks are completed by entering the substrate with heat, typically 180°F for 30 minutes.
An epoxy ink can provide a variety of catalysts to increase adhesion to the substrate. The strength of this ink is: the ink will not dry on the screen, the ink can be diluted with water, the water flushes the screen to facilitate, and the printing pattern is not easy to fade. Solvent-based ink pack resins, uv inks contain oligomers, which are different from solvent-based ink inclusions. Uv ink has less printing problems, uv viscosity will not change, ink does not evaporate, and four-color printing is easier.
Low performance and high content of ethylene, polyolefin, light weight paper, outdoor weather resistance for a long time, requiring strong chemical resistance and strong water resistance of the substrate, generally do not use water-based ink.
Plastic ink
Plastic ink drying method is evaporation, oxidation or polymerization reaction type. With good hiding power, it can print 1,500 square feet per gallon with a screen mesh of 200-260 T/inch.
Metal ink
Substrate surface treatment and coating, PET coating and organic glass coating are two basic coatings, to achieve the desired adhesion, the material drying temperature is 265-280 °F.
Uv ink must be fully cured.
Understand the type of substrate to choose the right ink, and choose a good ink to get a good printing effect. Therefore, choosing the right ink can achieve the ideal printing effect and the best performance. Choosing the right ink is the basis of screen printing. Volatile inks are physically linked. Oxidation and polymerization inks are physicochemically linked. Such inks can be used in applications that require strong solvent-resistant thermoplastics, such as PET. Lubricating oil can be added depending on whether or not the ink surface needs lightness.
Paper ink
The use of ink facilitates the use of coated and uncoated paper, outdoor advertising, signboards, bottles, signs, and cards. Can be divided into two categories: one-component and two-component. Unlike Uv inks and solvent inks and evaporation inks, solvent inks become dry ink films once the solvent evaporates; uv compounds contain oligomers, monomeric polymers, and photoinitiators. The disadvantage of aqueous reduction uv inks is that it is not easy to handle light weight paper and porous paper. The most widely used area is commercial advertisements, especially for papers with a weight greater than 80 bl. If less than this weight, the printed paper may wrinkle or curl. Chemical hardeners are used to improve external performance, but the need for cutting requires consideration of the softness of the ink. The ink can be naturally dried, heat dried.
Metal pigment ink
When metal ink is used for mounting, metallic resin ink must be used.
Water-based reduction uv ink
Aqueous reduction uv ink meets the solid content requirements and is used for uncoated paper. The ink is naturally dry for 15-20 minutes and takes a few seconds to dry.
Traditional water-based ink
Water-based inks are no longer available for transformation. The storage period is the time to determine if the material is still in use or away from the shelf life. Resin inks require rapid release of moisture without affecting the cross-linking of the resin. The phenomenon of flexing caused by fast paper absorption is a common problem.
Professional silk screen printing can produce a variety of colorful prints, in which the thick film ink is extraordinary, its lightfastness, abrasion resistance, good printability, for a variety of rigid, flexible substrates printing. It can be used for vacuum plasticity, but it must be checked for weather resistance, exposure to light and high temperature adhesion. Printing and printing bar, with perfect printing service as the main way to display corporate image and disseminate brand information, integrate printing resources, establish corporate websites, and use websites such as Printing and Online Online as media platforms to release related corporate soft papers and product information on schedule, and improve their counterparts. And consumer awareness of perfect printing.
Epoxy type ink
Epoxy ink has good resistance and can be used for various substrates such as glass, metal, ceramic wood, plastic and others. Two-component requires the addition of catalysts or hardeners, but has the advantages of both natural drying and baking inks. PS, PVC and PE, PP materials need to choose two different ink series. Other applications: Ethylene and metal substrates.
Uv ink can be cut, flexed, rubbed, soft, outdoor weather resistance up to 5 years. Due to the high water content, the thickness of the cured film can be slightly reduced and diluted with water and flushed with water. As the metal pigments dry and solidify, they will rise to the surface of the ink and overlap with the ink. This process is called the suspension of the metal particles. Photopolymers react with other compounds, such as single polymers. Printing and Printing Bar relies on abundant industry experience to provide business printing, packaging and printing. Varnish may be applied to metal surfaces by methods such as roller coating, curtain coating, spray coating or printing. With uv curable inks, the mixing of inks is very short. The varnish on the surface helps to protect the metallic pigments. When the metallic color can not reach the desired brightness, the pearlescent fluorescent color can be used instead of the metallic color, but the hiding power of the pearl fluorescent color is not as good as the metallic color. The curing process is accomplished by the action of a photoinitiator, which acts as a linker promoting, linking the dispersed molecules and allowing them to polymerize.
UV drying of PE materials can be completed in seconds. Two-component inks have higher storage requirements than single components. Uv inks and solvent evaporation inks have many advantages.
When the thickness of metal pigments such as copper and zinc reaches 10-40 μm, the hiding power is better.