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2022
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Acid dye varieties in the textile printing and dyeing industry of our country
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Acid dye varieties in the printing and dyeing industry of our country
Acid dyes are mainly used for the printing and dyeing of wool, silk, and nylon, and are also used for coloring leather and paper. They hold an important position in both production volume and import/export volume among various domestic dyes.
Among the yellow varieties, C.I. Acid Yellow 19 is a relatively important dye, used not only for the printing and dyeing of wool and silk but also for leather coloring. C.I. Acid Yellow 79 (Acid Yellow 4GL) is a shrink-resistant dye that can be dyed in an acidic bath (pH 4.5-5.0) with excellent wet fastness, suitable for wool and its blends, nylon, and silk, and can also be used for leather.
In the orange varieties, C.I. Acid Orange 24 and 56 are disazo dyes, while C.I. Acid Orange 154 and 174 are azo 1:2 type metal complex dyes.
In the red varieties, C.I. Acid Red 131 is a very important acid dye variety, suitable for deep shades in nylon dyeing, with bright color and good compatibility with similar varieties, having medium to high swimming mobility. When used with leveling agents (such as UivadinePA), it has good cover dyeing properties for stripes. It shows good dye uptake and performance when dyeing deep colors on various nylon fibers, and good wet fastness when dyeing medium colors.
In the blue varieties, C.I. Acid Blue 15 has a triarylmethane structure, mainly used for dyeing and printing wool, silk, and wool blends, with good stripping properties. This dye has particularly bright color, but poor light fastness (level 1). C.I. Acid Blue 171 has a light fastness of 6-7 on wool, soap wash fastness of 4/5, and sweat stain fastness of 5. C.I. Acid Blue 225 is an anthraquinone dye with bromoacrylamide groups, with a solubility in water (at 90°C) of 100 grams/liter, suitable for wool, silk, nylon, and their blends. When dyeing, adding the leveling agent AlbegalSET, the dyeing pH is 4.5-5.0, providing excellent protection for wool.
In the green varieties, C.I. Acid Green 81 can be dyed in an acidic bath (pH 4.5-5.0), with excellent wet fastness, including water immersion, soap wash, and shrinkage fastness. It is mainly used for monochrome and two-tone color adjustment, can dye deep, bright colors on nylon, and can also be used for dyeing wool and its blends, and silk. It has a light fastness of 6-7, with soap wash, alkaline sweat stain, nylon staining, and cotton staining all at level 5.
In the brown varieties, C.I. Acid Brown 282 has good water solubility (40 grams/liter at 90°C), with good light fastness, wet fastness, and leveling performance, as well as good blending performance. It can be used for wool and its blends, silk, and nylon. Due to its suitability for low-temperature dyeing, it causes little damage to wool, with excellent light fastness (1/1 standard depth can reach 7-8), suitable for textiles used in the automotive industry. Soap wash (at 40°C), alkaline sweat stain, and abrasion fastness are all at level 5, making it a very important variety.
In the black varieties, C.I. Acid Black 58 (Neutral Gray BL) is mainly used for dyeing wool and its blends, silk, and nylon. The dyeing process is simple and reliable, especially suitable for low-temperature dyeing of wool staple fibers and wool tops. If LanasanLTLig is added, good color yield can be obtained at 85°C, with high light and wet fastness, suitable for dyeing textiles for automotive interiors.
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