At present, water-based inks are mainly used for flexible and recessed plate printing. Among these, most of them are used in food packaging, tobacco and alcohol, pharmaceutical factories, and children's toys, occupying a considerable market share. Composition of water-based inks Water-based inks are made by compounding and grinding water-based resins, pigments, and solvents. Water-soluble resins mainly play the role of a binder in the ink, enabling the pigment particles to be uniformly dispersed, making the ink have certain fluidity, generating adhesion to the substrate material, and forming a uniform film layer after printing. Characteristics of water-based inks 1. Water-based inks are a new type of environmentally friendly printing ink with good adhesion, excellent flexibility, good elasticity, anti-retraction, water resistance, excellent printing performance, overprinting performance, and high solid content. 2. They are non-flammable, have stable ink properties, do not corrode the printing substrate, prevent color migration, have strong water resistance, dry quickly. They can not only reduce the hazards caused by static electricity and flammable solvents, but also reduce the toxicity of the printed surface residues. Moreover, cleaning the printing equipment is very convenient, so they are particularly suitable for the packaging industries of food, beverages, and pharmaceuticals. 3. The solvents of water-based inks are water and a small amount of alcohols. They have wide applications in the printing industry of T-shirts and other pure cotton and elastic fabrics, shoe insoles, etc. The usage instructions for water-based inks Applicable screen mesh: 40-100T (water-based silk screen plates) Applicable scraping: It is recommended to use 65-70 degree polyester scraping or water-based special scraping Coating area: 25-35 square meters per kilogram Sizing agent: Neutral water Washing agent: Ordinary tap water Requirements for mixing water-based inks Before use, the viscosity of the ink needs to be adjusted appropriately according to different printing requirements. When adjusting, pay attention to adding water as much as possible to be neutral to slightly alkaline, otherwise it will affect the viscosity and drying speed of the water-based ink. At the same time, the amount of diluent (water) added cannot exceed 3%, otherwise the color concentration of the ink will be reduced. Requirements for printing with water-based ink. Due to the characteristics of water-based ink, it is difficult to control the drying speed. Therefore, it is suitable for rapid printing. If the printing speed is too slow, it is likely to cause the ink to dry quickly on the screen plate and block the water. Requirements for drying of water-based ink. Water-based ink mainly dries naturally, but after printing, it is better to let it dry for 8 hours in the natural environment and then bake it for about 1 minute at 130 degrees. Usage of water-based ink additives Slow-drying agent: Used...

Water based acrylic resin has many applications. Today, let's talk about one of them - water-based ink. 1. Water-based ink and solvent-based ink As is known to all, water-based ink has the advantages of being environmentally friendly, non-toxic, without irritating odors, and without corrosiveness. During use, it can be diluted directly with tap water, and is harmless to the environment and human body. However, solvent-based ink has high image quality durability during printing. Its field is in the large-format and wide-format markets. The evaporation of solvents is more likely to cause certain pollution to the environment compared to water-based ink. water-based ink solvent-based ink Solvent Inorganic solvents (water) organic solvent Smell Low odor and non-toxic Stinky odor, toxic Applicable for printing Flexographic printing, intaglio printing Offset printing is the main method Water-based inks inherently meet environmental protection requirements. They have specific advantages such as being non-toxic, having no irritating odor, non-flammable, non-explosive, and convenient for transportation and storage. Currently, they are gradually taking market share from solvent-based inks. As environmental protection becomes increasingly strict, this rate of cannibalization will accelerate further. Water-based inks are made from water-soluble resins, water-based pigments, additives, and solvents. The additives generally include: defoaming agents, pH stabilizers, etc. Secondly, water-based inks are also divided into many types. The following are some examples: 1. Special water-based ink for food soft packaging laminated printing; 2. Special water-based ink for plastic surface printing; 3. Special water-based ink for soft PVC printing; 4. Special water-based ink for PVC heat shrink film printing; 5. Special water-based ink for PET heat transfer printing; 6. Special water-based ink for hygiene packaging materials printing; 7. Water-based plastic screen printing ink, etc. Thirdly, let's introduce a specific water-based plastic ink. BA Seriesis a room-temperature self-crosslinking acrylic modified resin, specially designed for water-based plastic inks. The product is easy to use and does not require a drying tunnel, meeting the drying requirements of various printing machines. Features: - Good leveling, wetting and adhesion - Good dispersion of pigments - Good transparency of film formation - High glossiness - Fast drying, etc. Application scope: Suitable for the manufacture of water-based inks on various plastic substrates (such as PVC, PET, BOPP, etc.). Main product indicators: Appearance: Light yellow transparent liquid pH value: 7.0 - 9.0 Viscosity (tested by rotor viscometer): ≥ 2000 mpa Glass transition temperature: Approximately 17℃ Usage method: Water-based acrylic resin can be adjusted in viscosity and drying speed by using alcohol or alcohol ether type solvents (such as propylene glycol methyl ether, isobutanol, ethanol, methanol, etc.). The dosage can...

Acrylic emulsion is widely used in printing inks. Here are its main functions and advantages: Enhance adhesion Acrylic emulsion can form a strong bond with various substrates (such as PET, BOPP, PE plastic films and paper), ensuring that the ink does not come off easily after printing. It is particularly suitable for packaging printing. Enhance glossiness and color spreadability It can make the surface of the printed product present a high gloss, while improving color saturation and clarity, enhancing the visual effect. It is often used in high-end packaging, labels and other products with high requirements for glossiness. Improve printing adaptability It has good leveling property and drying speed, can reduce ink flying, bubbles and other problems during the printing process, improve production efficiency and printing quality, and is especially suitable for high-speed printing equipment. Superior environmental performance As a water-based emulsion, acrylic emulsion has a low VOC (volatile organic compound) content, complies with environmental protection regulations, and reduces harm to the environment and human health. Chemical resistance and wear resistance The formed ink film has good water resistance, oil resistance and friction resistance, prolonging the service life of the printed product, and is suitable for outdoor or frequently exposed packaging materials. Application examples: Water-based plastic ink: used for plastic film printing, such as food packaging, daily use labels, etc. Water-based paper intaglio ink: suitable for paper printing, providing good color performance and adhesion. Aluminum coating water-based clear varnish: protects the aluminum substrate, enhances gloss and corrosion resistance. Notes: The performance of different types of acrylic emulsions varies. It is necessary to select the appropriate product based on specific printing requirements (such as substrate type, glossiness requirements, environmental protection standards, etc.), and optimize the formula through experiments Sinograce Chemical has been established for over 15 years and is dedicated to the research and development, production, sales and application promotion of high-tech functional materials. Its main products include: water-based emulsions, water-based resin dispersions, water-soluble resins, water-based ink binders, alcohol-soluble resins, water-based resins, innovative functional acrylic resins and functional additives, and other new and characteristic functional materials.

Macromolecular colorants are a new type of colored macromolecular polymers formed by introducing coloring groups into the main chain or side chain of macromolecules through certain chemical reactions. They have many advantages such as high safety and non-absorbability by the human body, and are a kind of environmentally friendly products that can save energy, reduce emissions and lower consumption. Since its synthesis,polymer dyehave always been regarded as a type of functional colored macromolecular compound. They not only possess the light absorption properties of small molecule colorants, but also exhibit the stability of polymers. This combination endows the macromolecular colorants with dual functions: namely, the large molecular size, high strength, easy film-forming property, solvent resistance, migration resistance, heat resistance, processability, as well as the strong absorption of light and the color diversity of the organic colorants. In recent years, the research on macromolecular colorants has made rapid progress and has now become a new field in functional polymers andcolor chemistry. Macromolecular colorants not only possess the general functions of small molecule colorants, but also have many special advantages. For example, when the polymer framework is combined with traditional food pigments, and the molecular weight reaches above 3000, it will not be absorbed by the human digestive system. It will be excreted through the intestines and will not cause harm to the human body, making it safer. The coloring agent raw material is a functional raw material and has the following advantages: Good resistance to migration. The large molecule colorants do not undergo molecular migration in the dyed substances, thus avoiding color mixing contamination. Excellent heat resistance. The non-volatile and high melting point nature of the large molecule, combined with its low solubility at high temperatures, makes it have better heat resistance. High safety. The large molecular chain size makes it unable to penetrate the skin and will not be absorbed by the human body, achieving the safety level for oral use. Strong resistance to solvents. The large molecule colorants do not dissolve in most common solvents or have very low solubility, making them less prone to fading. Good compatibility. The molecular framework used is the same as that of the dyed high molecular materials, significantly improving compatibility. Green and environmentally friendly. The water-based high molecular materials are prepared based on water-based high molecular synthesis technology, truly achieving green and environmentally friendly properties. Anhui Sinograce Chemical's large molecule colorants are safe and environmentally friendly, dedicated to being a color chemical manufacturer.