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    High-Quality Basic Dyes For Acrylic Dyeing
    Basic Dyes
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    Acid Dye Acid Red GR Acid Red 73

    Acid Dye Acid Red GR Acid Red 73
    Acid Dye Acid Red 3R Acid Red 18

    Acid Dye Acid Red 3R Acid Red 18
    Fertilizer Dye Acid Light Green

    Fertilizer Dye Acid Light Green
    Leather Dye Acid Black 210

    Leather Dye Acid Black 210
    Wool Dye Acid Black 10B Acid Black 1

    Wool Dye Acid Black 10B Acid Black 1
    Nylon Dye Tracid Violet 4BNS Acid Violet 17

    Nylon Dye Tracid Violet 4BNS Acid Violet 17
    Acid Dye Acid Red G Acid Red 1

    Acid Dye Acid Red G Acid Red 1
    Nylon Dye Acid Orange Ⅱ Acid Orange 7

    Nylon Dye Acid Orange Ⅱ Acid Orange 7
    Fabric Dye Tracid Dark Blue 5R Acid Blue 113

    Fabric Dye Tracid Dark Blue 5R Acid Blue 113
    Wool Dye Tracid Brilliant Blue 6B Acid Blue 83

    Wool Dye Tracid Brilliant Blue 6B Acid Blue 83
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    High-Quality Basic Dyes For Acrylic Dyeing

    1. Ionicity: It ionizes in water into cationic pigment groups and anions (such as Cl⁻, CH₃SO₄⁻, etc.). This is the most fundamental characteristic of basic dyes.

    2. Extremely vibrant and intense colors: Among all dye categories, basic dyes produce the most vivid and eye-catching colors, especially in terms of fluorescence and vibrant blues, reds, and purples.

    3. High tinting strength: A small amount of basic dye is sufficient to produce deep, rich colors.

    4. Main applications: Primarily used for polyacrylonitrile fibers (acrylic fiber).

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      Core Definition: Basic Dyes

      Basic dyes (now often called cationic dyes) are a class of dyes that dissociate in aqueous solution to form cationic pigments. They were initially named "basic dyes" because they require an alkaline dye bath to dye protein fibers, but modern applications and research are no longer limited to this condition.

      + A more accurate understanding

      It is a dye whose parent material carries a positive charge (cation), which binds to the negatively charged fiber through ionic bonds.

      Dyeing Technology and Leveling Control

      To address the problem of poor leveling, the dyeing process for acrylic fibers using basic dyes is very meticulous:

      Heating Rate Control
      This is the most critical measure. Typically, within the "critical dyeing zone" of 85-105°C, the temperature needs to be increased very slowly (e.g., 0.5-1°C per minute) to ensure uniform dye uptake.
      Specialized Auxiliaries
      Catonic retarder: Also a cation, but smaller than the dye molecule, it initially occupies some dye sites on the fiber, and is gradually replaced by the dye during the dyeing process, thus slowing down the dye uptake rate.
      Anionic retarder: Temporarily binds to the dye cations in the dye bath to form a weak complex, reducing the concentration of free dye cations, and is gradually released after heating.
      pH Control
      Adjusting the dye bath pH to a slightly acidic level (4-5) using acetic acid or similar substances controls the degree of dissociation of anionic groups on the fiber, thereby controlling the dyeing rate.

      Classification and Development

      Historical Background
      Traditional Basic Dyes

      Such as Basic Magenta, Basic Green (Malachite Green), Basic Yellow, etc. Mostly triarylmethane, azo, or thiazine structures, they offer bright colors but poor fastness, primarily used for dyeing paper, leather, feathers, and early silk.

      Technological Advancement
      Modern Cationic Dyes

      Developed specifically for synthetic fibers (especially acrylic fibers). Based on their application performance and chemical structure, they can be classified as:

      General Type (K type) Poor migration and leveling properties.
      Leveling Type (M type) Good migration and leveling properties.
      Migration Type Best leveling properties.
      Disperse Cationic Dyes: Suitable for one-bath dyeing of acrylic fibers blended with other fibers.

      Main Application Areas

      Most Critical Application
      Primary Use: Polyacrylonitrile Fibers (Acrylic)

      Dyeing and printing of polyacrylonitrile fibers (acrylic fibers). This is its most important and suitable application area.

      Modified Synthetic Fibers Cationic dyeable polyester (CDP), nylon, polypropylene, etc.
      Special Applications: Paper Paper dyeing (especially cultural paper and colored tissues).
      Leather Dyeing Used for various leather coloring processes.
      Ink Manufacturing Ink and ballpoint pen ink manufacturing.
      Biological Staining Cell staining agents for microscopic observation.
      Natural Products Coloring of bamboo, wood, and grass products.

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