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Basic Dyes

Basic dyes are also known as cationic dyes because of the presence of positive charge in the dye molecules under dyeing conditions. And they are a class of synthetic dyes which are derived from organic bases. When basic dyes are dissolved in water, colored cationic salts can be formed, and these cationic salts can react with anionic sites on the surface of the substrate. Basic dyes produce bright shades with high coloring value on textile materials, unrivalled by any other class of dyes. Basic dyes are powerful colorants which are applied in wool, silk, cotton and modified acrylics. Furthermore, they are particularly useful for coloring paper products that require high color intensity, such as gift-wrapping paper or tissue paper. Acetic acid is usually added to the dye bath to help the dye attach to the fibers.

Basic Dyes

As a professional supplier of high-efficiency dyes, Alfa Chemistry has the ability to provide customers with a comprehensive range of basic dyes.

Structure of Basic Dyes

Basic dyes usually contain one or more aromatic rings, such as benzene or naphthalene, which are often mono-substituted or poly-substituted with various functional groups. These aromatic rings are attached to a basic nitrogen-containing group, such as an amino (-NH2) or imino (-NH-) group, giving the dye molecule a positive charge. The specific chemical structure of a basic dye will vary depending on the particular dye molecule.

Features of Basic Dyes

  1. Basic dyes are hydro-chlorides or salts of organic salts.
  2. Cationic part of basic dyes is responsible for color production.
  3. Basic dyes are easily soluble in alcohol but not easily in water.
  4. Dyes decomposes at boiled temperature.
  5. Basic dyes have poor light fastness, and their washing fastness ranges from poor to moderate.
  6. The addition of glacial acetic acid helps the basic dyes to dissolve quickly in water.
  7. The wet fastness of the basic dye on protein fibers can be improved by back tanning.
  8. When treated with a reducing agent, most basic dyes turn to their original color.
  9. Basic dyes are known for producing bright and vibrant colors, making them popular choices for coloring textiles, paper, and cosmetics.
  10. Cotton has no affinity for basic dyes but dyeing of cotton could be carried out by mordanting, fixing and dyeing operation.
  11. An important property of basic dyes is that they combine with tannic acid to form an insoluble compound, in the absence of mineral acids.

Alfa Chemistry is committed to becoming a first-class, low-carbon, environmentally friendly dye supplier. Our mission is to provide customers with full specifications of high-quality dyes. We are also constantly expanding our product database to meet the wide range of customer needs. You are welcomed to contact us more basic dyes.

It is important to note that our products are for research use only and are not for clinical use.

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