Compared with other dyes, vat dyes have a series of significant characteristics. Due to these characteristics, they are often used to solve certain fastness issues. Let's take a look together!
1. The color of vat dyes is mostly in the middle color
The color of vat dyes has a complete series of characteristics from yellow to black, and from bright colors to general colors. Its biggest feature is that the intermediate colors are mostly single components, and the dyeing reproducibility is good, especially in the green, olive green, flesh color, brown, and gray series,
For example, green reactive dyes are generally made by combining yellow and emerald blue reactive dyes. In order to combine reactive dyes with different dyeing properties well, control during dyeing is important. In vat dyes, there are several single structured green varieties that can not only meet different needs, but also have excellent dyeing reproducibility compared to reactive dyes.
The current requirements for various composite fastness based on light fastness on cotton fabrics, such as sweat sunlight fastness, sweat sunlight washing fastness, sweat sunlight friction fastness, etc., are increasing. Especially for light colors, vat dyes have special properties compared to other types of cotton dyes. Therefore, they are very suitable for dyeing and printing workwear, summer clothes, sportswear, coats, curtains, furniture covers, etc.
3. Has excellent chlorine resistance and moisture fastness
Compared with reactive dyes, vat dyes have excellent chlorine fastness, whether it is chlorine water (20ppm) or chlorine? (500ppm) fastness; In addition, vat dyes have excellent washing fastness, so they are suitable for occasions with high requirements for chlorine disinfection and washing resistance, such as printing and dyeing fabrics, bedding, covers, bed sheets, clothes, etc. used in hotels and hospitals. Especially for products that require multiple washing treatments, the advantages of using vat dyes are more obvious. In addition, vat dyes are also suitable for dyeing and printing textiles that require the highest level of moisture fastness, such as ground dyeing with reactive dyes and textiles with anti pull printing with vat dyes.
In countries and regions such as the United States and Europe, in order to reduce washing water, strong detergents are used, which are new detergents made by adding tetraacetylethylenediamine (TAED) to peroxides, or large amounts of detergents are used in washing water and washed with warm water. The reduced dyes also have sufficient fastness.
4. It has excellent stability in the post-processing of printed and dyed fabrics
Vat dyes have minimal impact on general resin finishing. In recent years, functional processes that cause changes in fiber properties, such as shape memory processing, shape stabilization processing, odor prevention processing, antibacterial processing, etc., have been developed. Vat dyes have good stability, and their dyes have more stable temporal variability than reactive dyes.
5. One bath same color dyeing suitable for blended fabrics
The one bath dyeing of blended fabrics such as polyester/cotton, nylon/cotton, and vinylon/cotton is becoming increasingly popular in the printing and dyeing industry. Vat dyes have the characteristics of this same color dyeing, and are suitable for continuous dyeing, printing, and immersion dyeing of these blended fabrics. These dyed fabrics can be used to manufacture student uniforms, various uniforms, breathable coats, and special textiles, especially military uniforms and combat clothing (such as camouflage clothing), and have excellent various fastness and anti infrared properties.
6. Has excellent resistance to reduction
The characteristic of vat dyes can be used to manufacture advanced textiles for reactive dyeing and anti pull printing with vat dyes, ground free dyeing of polyester/cotton knitted fabrics (using a flow dyeing machine), pre dyeing process of polyester/cotton blended fabrics (using tube yarn dyeing), and high fastness printing and dyeing of polyester/cotton blended fabrics (using URS method).
7. It can be dyed into colors with natural tones and extremely clear and intuitive effects
Fabric dyed with vat dyes can exhibit natural plant tones and European style characteristics on the basis of coarse tones. For example, various washing treatments (stone washing, bleaching, etc.) can be applied to dyed fabrics dyed with indigo and vat dyes, resulting in textiles with extremely clear and natural plant tones.
In summary, compared with other cotton dyes, vat dyes have a series of significant characteristics, especially reflected in their fastness performance. Therefore, currently, vat dyes are still a type of cotton dye that deserves attention.
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