Offset Inks For Packaging Printing
Offset ink has good rheological properties, which can be smoothly transmitted and transferred in the ink roller system of the printing press, ensuring that the ink is evenly coated on the printing plate. It also has appropriate viscosity and dryness. Viscosity ensures that the ink can be transferred from the printing plate to the rubber cloth during the printing process, and then accurately transferred to the substrate, while dryness determines whether the ink can dry in a suitable time after printing to prevent the printed product from being smeared.
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Product Introduction
Types
Oil-based offset inks: They are the most commonly used type, known for their strong adhesion, vibrant colors and good durability.
UV offset inks: They dry through ultraviolet radiation, have the advantages of fast curing speed, high gloss, good abrasion resistance and chemical resistance.
Water-based offset inks: They are environmentally friendly, easy to clean, and have low volatile organic compound (VOC) emissions.
Solvent-based offset inks: They have good solubility and fluidity, can be used on a variety of printing materials, and have a fast printing speed.
Components
Pigment: It provides color and opacity to the ink, determining the color and shade of the printed matter.
Vehicle: It serves as a carrier for the pigment, controls the ink flow, and determines the drying type and speed of the ink.
Additives: They are used to adjust specific properties of the ink, such as drying time, viscosity, and adhesion. Common additives include drying agents, defoamers, and leveling agents.
Selection Considerations
Substrate type: Different substrates require different inks. For example, paper and cardboard may use water-based or oil-based inks, while plastic and metal may require solvent-based or UV inks.
Printing process: Consider the printing speed, number of colors, and drying method of the printing equipment. High-speed printing machines may require fast-drying inks.
Environmental requirements: In response to environmental protection requirements, choose inks with low VOC emissions and no harmful substances, especially for food and pharmaceutical packaging.
Desired finish: Matte or glossy finishes can be achieved by selecting appropriate inks or adding varnishes.
FAQ
1.Can offset inks be customized to meet specific packaging design requirements?
Yes, offset inks can be customized for packaging design needs:
Color: Match Pantone colors precisely or create custom - formulated colors by mixing pigments for brand - specific or unique hues.
Special Effects: Produce metallic, pearlescent, fluorescent, or phosphorescent inks for luxury, eye - catching, or novelty packaging.
Performance: Adjust adhesion for different substrates, control drying times for production speed requirements, and enhance resistance to moisture, grease, chemicals, or UV light as per packaging use cases.
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