Vat Green 2

The appearance of VAT green 2 is generally dark green powder, insoluble in water, acetone, alcohol, chloroform, pyridine and toluene. Slightly soluble in o-chlorophenol; It is dark purple in concentrated sulfuric acid. The cryptochromes produced by the dye in alkaline insurance powder solution are blue, while those in acid insurance powder solution are blue and red.

Characteristics

The appearance of VAT green 2 is generally dark green powder, insoluble in water, acetone, alcohol, chloroform, pyridine and toluene. Slightly soluble in o-chlorophenol; It is dark purple in concentrated sulfuric acid. The cryptochromes produced by the dye in alkaline insurance powder solution are blue, while those in acid insurance powder solution are blue and red.

Usage

• ‍1.Restore brilliant green 2 g jig dyeing for cotton products or impregnation, the most appropriate to use a method, also available b when the color matching method, c method. Dry cylinder reduction to 10 ~ 15 min, reduction temperature 50 ~ 60 ℃, dry cylinder stable for more than 60 min
• 2.Reduction of cotton fiber of brilliant green 2 g leuco affinity is high, medium, levelness dyeing curve as shown in figure 4, 5-29. The dead cotton covering power medium. Are more sensitive to hard water, so the modulation dyes and dyeing, appropriate is used by the softening treatment of water. When dyed light color easy produce off color, flower color, can add a moderate amount of leveling agent to improve, but unfavorable and overmuch, generally less than 1 g/L. After dyeing, washed with water, sodium perborate or hydrogen peroxide oxidation, a normal light can be obtained. Besides jig dyeing and dyeing, also applies to suspension pad dyeing, etc.
• 3.VAT brilliant green 2G is suitable for direct printing. Dichromate should not be used during oxidation, otherwise the color will fade. It is not suitable for discharge printing.
• 4.When 2G viscose fibers were dyed with VAT brilliant green, the temperature was lower and the color was slightly yellow. The temperature is high and the color turns blue. If 45 ℃ in dyeing, viscose fiber group color darker. With its fine powder pad dyeing of cotton blended fabric, uniform dyeing results are available, but slightly red light and a collapsing. Used for polyester/cotton blended fabric printed directly, colours are basically identical.
• 5.VAT bright green 2G printing and dyeing fabrics were treated with urea formaldehyde and cyanal resin, and the color light turned slightly blue.‍

Technical Specifications

• ‍Product Name: Vat Green 2
• C.I. No.:59855
• CAS No.:25704-81-8
• Molecular Formula:C36H18Br2O4
• Molecular Weight:674.33372

Precaution

• ‍1.When VAT brilliant green 2G dyeing cotton knitted cloth, attention should be paid to its slightly poor chlorine bleaching fastness, and the color will become lighter and turn yellow after bleaching.
• 2.When REDOX brilliant green 2G dyeing, the amount of insurance powder should be increased according to the regulations. It is not recommended to cook with intense soap, or the yellow light is insufficient and the blue light is heavy.
• 3.VAT brilliant green 2G should be stored in dry and ventilated place to avoid damp.‍