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Direct Black 19 Dyes

Direct Fast Tan G is one of the main black dye varieties. It is mainly used for dyeing and direct printing of cotton, viscose fiber and cotton, viscose fiber interwoven with silk and wool, and blended fabrics. It is mainly dyed black, and gray and black are generally used for printing. It can also be combined with brown dyes to form various shades of coffee and other colors, and a small amount is used for toning light to increase the color spectrum. When dyeing wool and viscose blended fabrics, it can be dyed in the same bath with neutral black BRL, and the color is uniform. It can also dye polyester and viscose blended fabrics in the same bath with disperse dyes. The dye uptake is good, and the dye migration is slightly poor. After dyeing, it can be treated with fixing agent Y and fixing agent M, but the shade is slightly green. Finishing with urea-formaldehyde resin can not change the shade, and can also improve the fastness to wet treatment.
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Product Introduction

Product Info


Type: Direct Dyes, Direct Black Dyes

Product Name: Direct Black 19, Fast Black G 100%
CAS No.:6428-31-5
EINECS: 229-208-1
Molecular Formula:C34H29N13O7S2


Product Description


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Formule

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Chemical Properities

Direct Black 19 Dyes is black powder. Water solubility is good, its aqueous solution is green black, adding concentrated lye is green blue, adding 10% sulfuric acid color slightly red. Slightly soluble in ethanol and acetone. In concentrated nitric acid is dark brown, in concentrated sulfuric acid is green black, after dilution produces red black precipitate. When dyeing, copper ion color light is slightly green, and iron ion color light changes slightly.


Application

Direct Black 19 Dyes is mainly used for dyeing and direct printing cotton, viscose fiber and cotton, viscose fiber, silk and wool woven and blended fabric.When dyeing wool viscose fiber blended fabric, it can be dyed with neutral black BRL in the same bath to get uniform color. It can also be used with disperse dyes in the same bath to dye polyester and viscose blended fabrics.


FAQ

1.What is your payment term?

Generally for the first cooperation our payment term is 30%T/T IN ADVANCE+70%T/T AFTER B/L COPY

2.Are you a trade company or a manufacturer?

We are a munufacturer with more than 15 years’ experience.

3.What certificates do you have?

We have OEKO-TEX, BLUESIGN, ZDHC,etc.


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