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An acid dye is a dye that is typically applied to a textile at low pH. They are mainly used to dye wool, not cotton fabrics. [1] Some acid dyes are used as food colorants, [2] [3] and some can also be used to stain organelles in the medical field. Acid dyes are anionic, soluble in water and are essentially applied from acidic bath.
Acid Orange 7, also known as 2-naphthol orange is an azo dye. It is used for dyeing wool. Preparation It is ...
Acid Blue AS Weak Acid Blue Acid Blue 25: 62055 anthraquinone: 6408-78-2: Acid fuchsin: Acid Magenta Acid Rubin Acid Violet 19 42685 triarylmethane: 3244-88-0: Acid orange 3 Acid orange 3 10385 nitro 6373-74-6: Acid orange 19: Acid Orange 19 14690 azo: 3058-98-8: Acid orange 20: Orange I Acid Orange 20 14600 azo 523-44-4: Acid Red 13: Fast red ...
Broadly, dyes are soluble and become fixed to a substrate via impregnation, while pigments are insoluble and require a binding agent to adhere to a substrate. Dyes, therefore, must have an affinity for the substance they are intended to color. [4] Chemically speaking, pigments can be organic or inorganic, while dyes are only organic.
At a pH of less than 0 the dye has a red colour with an absorption maximum at a wavelength of 465 nm. At a pH of around 1 the dye is green with an absorption maximum at 620 nm while above pH 2 the dye is bright blue with a maximum at 595 nm. At pH 7 the dye has an extinction coefficient of 43,000 M −1 cm −1. [8]
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Fiber-reactives dyes are relatively safe and simple to use, [3] and are the same dyes used commercially to color cellulosic fabrics. Protein-based fibers such as silk, wool, and feathers, as well as the synthetic polyamide fiber nylon, can be dyed with acid dyes. Acid dyes are effective at acidic (low) pH, where they form ionic bonds with
Hair Color for Men. Most hair dye these days works well on a variety of hair textures and colors, but for black men with highly textured, dark hair who want full coverage, this variety fits the ...
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