Special Color Denim

Because of the super indigo dye or the deep indigo blue.

After being washed and processed, the garments can get special effects of bright color and bright colors, and are widely welcomed by consumers.

"Super indigo" dyed denim has two main characteristics: deep dyeing depth and excellent color fastness to abrasion.

The former refers to the amount of indigo dye dyed on the yarn per unit weight (generally expressed as% of the dry weight of the dyed yarn, or for dyeing depth%). For example, the depth of the conventional denim warp yarn indigo dyeing is 1% to 3%, while the "super indigo" dyeing depth needs to reach more than 4%, which can be called super indigo blue or deep indigo blue.

The latter refers to the "super indigo" dyed denim garment which needs to be subjected to repeated washing for more than 3 hours, and its color can still reach or exceed the color depth of the conventional dyed denim, which is much brighter and brighter than the conventional dyed denim.

The color fastness of indigo dyed denim is determined by the degree of penetration of dyestuff to yarn, rather than the color fastness of dyestuff itself (Indigo wet grinding fastness is only 1 grade), that is, the penetration degree is better and the color fastness of washing is better.

Because

The dyeing depth is more than 60% higher than that of the conventional traditional denim dyeing. Therefore, the indigo concentration of the dyestuff will increase exponentially, even reaching 3 ~ 4g/L, so that it is possible to get a deeper color.

In this way, the viscosity of the dyestuff increases, and the fluidity becomes worse, which affects the permeability of the dye leucosomes and reduces the color fastness of the denim.

The higher the indigo concentration in the dye solution, the heavier the red light of the dyestuff and the darker the color, the less the effect of "super indigo".

Therefore, many manufacturers have been or are preparing to rebuild the dyed pulp equipment, and solve this problem by increasing the number of dye channels.

The dyeing rate is the highest and the color is stable. At the same time, the dyeing tension of warp yarn is reduced properly, so as to obtain better "super indigo" dyeing effect.

In order to increase the color and color change of indigo blue jeans, a variety of DENIM DENIM varieties are popular at present.

For example, indigo dyeing, sulphur black, indigo dyeing, sulphur grass green, sulphur black green, sulphur blue and so on, so as to meet the needs of personalized market.

At the same time, denim production plants have their own patent features of new cowboy varieties to enhance the competitiveness of the market.

In this regard, it is necessary to pay attention to controlling the concentration of mother liquor as much as possible and preventing excessive overflow of dye solution, resulting in the waste of dyes and the environmental pollution.

The main products are bromine indigo (market known as turquoise blue) denim and sulphur black denim, as well as dyed with sulphur dyed coffee, green, gray, khaki, vulcanized blue denim, and a small amount of red, peach, and Jean Denim dyed with NaF or reactive dyestuffs. Although the production volume is not large, the market demand is more urgent, and often can not meet the need.

The main problem is that the color and luster are not stable enough, the dyeing importance is not good, and the garment factories are not satisfied. This is not related to the small batch production and the excessive color. However, it is difficult to produce the coloured varieties from the combined dyeing machine.

One way to solve the problem is to reduce the number of color matching as far as possible, as far as possible to use two colors, not more than three matching colors, or to replace the other stable dyes to suit the production characteristics of the dyed pulp online, and to achieve a more stable dyeing effect. Two, a more thorough solution is to use the dyed weaving factory's large capacity dyeing of yarn, and the production line of the bar warping is ideal for producing colored denim.