1, authentic jeans using indigo dye, fabric colorless or stripe. After the stone bright vivid feeling, a little red, sackcloth no significant staining. 2, after the stone mill, the fabric feels soft, plush velvet fabric. Frill at the sewing was white, no traces of wear at the plane, uniform color. 3, Sewing make double seams, the waist with chain-type sewing, and the use of pure polyester 215/3 strands, sewing fast, not easy to sew. 4, metal hook, New Zealand, the card is in the gap, no wear coating, the opposite padding cloth to prevent cracking damage. Ring Spinning Denim With the development and application of new technology and equipment such as high speed ring spinning, large package, fine knitting, knotless knitting and so on, the short yarn length of coarse yarn branch is short, the production efficiency is low, has been solved. Denim yarn gauze is replaced by the current situation is rapidly changing, the great re-emergence of ring yarn trend. Since ring-spun denim is superior to air-jet yarns in some aspects such as hand feel, drape, tear strength and the like, and because of the psychological return to nature, the pursuit of the original developed denim style is more important because the ring yarn Spinning denim clothing after grinding process, the surface will show a hazy bamboo-like style, is in line with today's personalized jeans needs. In addition, the market is very popular slub yarn denim, and ring bamboo can be spun out of a shorter and more dense bamboo, but also to promote the development trend of ring denim. Bamboo denim When designed with different yarn number, different thickness of bamboo (compared with the base yarn), bamboo length and pitch slub yarn, single or single latitude and longitude and latitude are equipped with two-way bamboo Yarn, and the same or different number of normal yarn and the appropriate ratio of the arrangement, you can produce a wide range of bamboo denim, washed by the garment can be formed after a variety of different hazy or clearer stripes Style-style jeans, by the consumer demand for personalized groups. Early bamboo denim are almost all ring slubby, because it can be spun shorter length, pitch smaller, relatively dense density of slub yarn, easy to form a more dense fabric effect, and To the main bamboo festival. With the development of consumer demand in the market, the popular two-way bamboo denim fabric, especially the two-way elastic weft bamboo denim fabric, are very popular in domestic and foreign markets. Some varieties, as long as the organizational structure well designed, the warp can be a single species of ring yarn, weft with the appropriate proportion of slub yarn, the same can be achieved Jingwei two-way effect of bamboo denim. The use of stretch denim spandex stretch yarn, the denim varieties to the development of a new field, the denim can be both personal and comfortable, together with bamboo or different colors, so that the cowboy products more fashionable and personalized Therefore, consumer demand has great potential for development. At present, most denim stretch elastic weft, elastic elongation is generally 20% to 40%, the elastic elongation depends on the size of the fabric design, the warp and weft in the fabric machine to the smaller the tightness, the greater flexibility, On the contrary, under the condition that the warp yarn tissue tightness is fixed, the greater the tightness of the weft elastic yarn, the smaller the elasticity and the tightness in the weft direction, or even the loss of elasticity. In addition the current stretch denim finished cloth outstanding problem is the zonal shrinkage is too large, usually 10% or more, some even as high as 20% or more. Fabric instability to bring great difficulties in the production of apparel, the first solution is to design the product do not make elastic stretch too large, generally take 20% to 30%, that is, to maintain a certain latitude and longitude to the tightness of the organization, and in Shrinking finishing to take appropriate ways to increase the tension, so that the fabric has a larger contraction, so as to obtain a lower degree of finished fabric weft shrinkage shrinkage rate; Another solution is elastic denim after pre-shrink finishing heat-setting treatment , So you can get a more uniform cloth width and more stable, low latitude shrinkage, to meet the garment processing requirements. Special color denim Because of the super indigo dyeing or special deep indigo dyed denim fabric clothing after processing, can get bright color and bright special effects, and has been widely welcomed by consumers. "Ultra Indigo" dyed denim has two main characteristics: the depth of the deep dyeing and grinding fastness particularly well. The former refers to the unit weight of yarn dyed indigo dye amount (usually accounted for the dry weight of the yarn accounted for% of the said dry, referred to as the depth of staining%) is particularly large, such as conventional denim warp yarn indigo dyeing depth of 1% to 3% , While "Ultra Indigo" dyeing depth needs to be more than 4%, can be called super indigo or extra deep indigo. The latter refers to the "super Indigo" dyed jeans need to withstand repeated washing more than 3 hours, the color can still meet or exceed the conventional dyed denim without the depth of color when washed, and its color than conventional dyed denim Bright and much brighter. For indium-dyed denim mill rubbing fastness, its essence is dependent on the degree of penetration of the yarn on the yarn dye, rather than the dye itself washing fastness (indigo wet grinding fastness of only 1), that is, through the core The better the degree of grinding color fastness better. The so-called "indigo dyeing rapid washing process", in fact, in the yarn dyeing process, indigo dye on the fiber through the intentional very shallow, so that when the denim garment processing, the yarn surface is extremely thin After the layer of dye is worn away, exposing more white yarn core, the color quickly fades, so as to achieve a short time after grinding, the effect of fading immediately. The "super-Indigo" dyeing process, on the contrary, require the dye to penetrate the core level is particularly good, so that the denim garment after grinding processing, both deep and bright color to get. Since the dyeing depth of "Super Indigo" dyed denim products is increased by more than 60% compared to the conventional conventional denim dyeing, the indigo concentration of the dyestuff will also increase exponentially even to 3 ~ 4g / L to make it possible to obtain deeper Thick color. Such dye viscosity increases, the fluidity deteriorated, affect the penetration capacity of the dye leuco body, so that the color fastness of denim mill rubbing, less than the final depth of garment production demand. So some companies to take to increase the depth of the dye again to design, so that the concentration of dye indigo once again increased the permeability will become worse, so a vicious circle back and forth, still can not meet the "super Indigo" color requirements. The higher the concentration of indigo in the dye solution, the heavier the redness of the dye is and the darker the color is, there is no "super indigo" effect. Therefore, at present, many manufacturing plants have been or are preparing to rebuild the dyeing and mortar equipment, with the method of increasing the number of dyeing ways to solve this problem. For example, the number of dyed channels increased to 8, or even 10, not only investment costs, dye consumption increased, the operation more difficult, and increased environmental pollution. A better way to solve this contradiction is to appropriately reduce the dosage of the insurance powder or caustic soda, especially the control of the amount of caustic soda, so that the pH value of the liquor is stabilized between 11 and 12 with the highest dye uptake and stable color, meanwhile Appropriate to reduce the dyeing tension of the warp yarn, so as to obtain a better "super indigo" dyeing effect. To indigo-based color sets of denim To increase the color of indigo cowboy varieties, color change, a variety of color cowboy varieties is extremely popular. For example indigo dyed black sulfide, indigo dyed vulcanized green sulfur black sulfide, blue sulfide, etc., to adapt to the needs of the market. At the same time, the denim fabricators also have their own patented cowboy new varieties to enhance the market competitiveness. In this regard, it should be noted that, as much as possible to control the concentration of the mother liquor to prevent excessive overflow of the dye caused by the waste of dyes and expand the pollution of the environment. Color (color) denim is mainly bromine indigo (market commonly known as turquoise) denim and black vulcanized denim, and the use of sulfur dyes mixed colors of coffee, green, gray, khaki, blue vulcanized denim, as well as a small amount of Nafu dyes or reactive dyes dyed red, pink, feminine denim, etc., although the production volume is not large, but the market demand more pressing, often can not meet the needs. The main problem is the color shade is not stable enough, less attention to dyeing, garment manufacturers are not satisfied, which of course is not associated with the production of large, too much color, but the combination of dyeing machine production of color varieties more difficult, consumption Large, high cost, and difficult to deal with sewage, etc., but also a certain impact. The first solution is to minimize the number of spell color design, as much as possible the use of two-color, up to no more than three-color, or use other more stable dye varieties to replace, in order to meet the production line of pulp dyeing machine, access to more Stable dyeing effect; the second is a more complete solution to the method of yarn-dyed yarn factory or large-capacity dyeing, slitting through the production line to produce shimmer denim fabric is ideal. (C01)