• How to choose water-based gravure ink resin
    How to choose water-based gravure ink resin

    2024-03-20

    The resins that can be used for water-based gravure inks are acrylic resin, polyurethane resin, alkyd resin, etc. Each resin has different characteristics and application occasions, and needs to be selected according to the actual situation. First, water-based gravure ink overview Water-based gravure ink is an environmentally friendly ink, compared with traditional ink, its volatility is small, non-toxic and tasteless, non-flammable, with good printing effect and color stability, and in line with indoor air quality standards, in line with environmental requirements. Therefore, water-based gravure ink has been widely used. Second, the resin selection of water-based gravure ink Scattered droplets will break into various shapes due to different forces, but if the droplets are continuously sprayed into the same place, they can form relatively regular columns. If you use a YAG laser and divide the matrix, you can draw this columnar array when you cover the picture. Second, commonly used resin selection 1.Acrylic resin Acrylic resin has the advantages of high transparency, good weather resistance, excellent chemical properties, fast curing speed and strong film forming ability. The ratio of acrylic resin to other water-based resins can achieve different effects. Acrylic resin is suitable for printing paper, strip, film and other materials. 2.Polyurethane resin Polyurethane resin has good abrasion resistance, adhesion, scratch resistance and excellent printing effect. The transparency of polyurethane resin is good, even if it is printed with different color background materials, it can still accurately restore the primary color. 3.Alkyd resin Alkyd resin is a versatile resin with excellent adhesion and gloss. The ratio of alkyd resin and other resins can achieve different printing effects. Alkyd resin is mainly suitable for printing patterns and text products. Third, the choice of resin Each resin has different characteristics and application occasions, it is necessary to choose the appropriate resin according to the actual situation. At the same time, manufacturers can also combine and select according to product requirements to get better printing results and production benefits. Ending In summary, the choice of water-based gravure ink resin has an important impact on the printing effect and environmental protection requirements. Manufacturers should choose resins according to the characteristics and needs of their own products to achieve better printing results and production benefits.

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  • Screen printing ink in the use of four major failures and elimination methods
    Screen printing ink in the use of four major failures and elimination methods

    2024-03-15

    In order to prevent ink delamination and pigment precipitation, users must be fully stirred before printing. The following summarizes the faults and elimination methods of screen printing ink in use for your reference. 1.Poor adhesion: the reason is improper selection of ink, insufficient pre-press treatment, impurities in the substrate, insufficient drying temperature, insufficient time, improper dosage of additives, curing agent, drying agent, two-component ink color overlay printing background color curing hard. Because PE, PP, PET, aluminum foil and other materials have very low chemical polarity or are too smooth, they are generally treated with electric spark, flame, and strong acid immersion to improve the surface tension of the printed surface. After the base color table is dry, it can be printed. 2.Pinhole: The reason is that the substrate is too smooth, the printing surface has grease or impurities, and the ink itself is poor, so the surface of the substrate must be pre-press treatment, adding leveling agent or replacing excellent ink. 3.Drawing: The reason is that the viscosity is too high, the drying is too fast, and the resin used in the ink is not properly matched with the solvent. Appropriate solvents should be used, appropriate viscosity should be adjusted or good ink should be replaced. 4.White or foggy printing surface: the reason is that the diluent contains water, the printing environment air temperature is high, or the printing ink itself is poor. Because when the printing surface is dry, the solvent volatilization will absorb the surrounding heat, resulting in local water vapor solidification in the ink film or the surface causing white atomization, so you should choose the appropriate drying speed or reduce the space temperature, or replace the excellent ink.

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  • Storage stability of ink
    Storage stability of ink

    2024-03-14

    After the ink is stored for a period of time, the upper part of the ink appears thin in the container, the viscosity is small, and the color and concentration are relatively poor; The lower part is thick, the viscosity is large, and the color and concentration are also relatively good. Intaglio printing inks are thin and have a small viscosity, because the pigment is poorly dispersed in the connecting material; Excessive density of pigments or fillers; It is easy to precipitate after long-term storage. Even after fully shaken, without affecting the use of the conditions, this state of the ink will give customers a bad impression, while increasing the burden of workers.

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  • What is the resolubility of ink
    What is the resolubility of ink

    2024-03-13

    In gravure printing, ink resolubility is also a key indicator to test the performance of ink. Especially in the color ink printing, the moderate resolubility can not only make the color fully displayed, but also solve the problem of shallow plate mesh blocking and overprinting cross-color. In color ink printing, according to the different hue requirements, the depth of the ink hole mesh of the printing plate is different, the amount of ink transferred to the surface of the substrate is also different, the volume of the ink hole is large, the amount of ink filled in the printing process is large, and the film layer transferred to the substrate is thick; The inking hole volume is small, the amount of ink filled is small, and the film layer transferred to the substrate is thin. As a result, a dense and colorful picture is formed on the substrate. Inks with poor resolubility, in the shallow screen part of the plate due to the high-speed rotation of the cylinder in the ink tank, the residual ink is not easy to be re-dissolved by the ink in the ink tank, resulting in the shallow printing of the net hole, and eventually causing the blocking accident. For inks with good resolubility, the printed ink is easy to be dissolved by the ink solvent in the printing plate during the overprinting process, resulting in ink crosstalk problems. Sinograce Chemical produces primer adhesion promoter and polyurethane resin for printing ink Chemical Additives.welcome to consult.

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