(1) Gasoline Spot
Appearance: Occurred in E/R blended fabrics. After dyeing, there were spots of oily droplets, slightly darker than normal parts. Observed with a magnifying glass, the plush in the dark part of the fabric, the tip shows a tiny bead, and more than normal plush.
Causes: This is caused by the uneven singeing. Spots are stained with thick spots. Plushs are not fully burned. They become melted at the tip and have a strong color-absorption.
(2) Fuzz (Nap)
Appearance: After dyeing and finishing the fabric, the fabric is still slightly plush, different from the color of the pattern.
Causes: 1) Singe is not sufficient enough to completely burn out the hairiness of the fabric. 2). When using the liquid dyeing machine, the jet flow is too strong.
(3) Inperfect Penetration Of Dye
Appearance: After dyeing, the cloth appears dark clouds.
Causes: 1). Desizing, seminal plasma is not sufficient, or wax and other substances that have been treated and removed are attached to the fabric. 2) When the bath dyeing bath ratio is too small, the heating rate is too fast, so that the staining liquid is in a gelled state.
(4) Refined spots
Appearance: During the scouring process, the non-fibrous materials in the scouring-off fabric are combined with the scouring agent, and then the plush falling under the fabric is embedded and adhered to the surface of the fabric. The irregular yellow flake marks appear on the fabric surface. When the nails are lightly shaved, short piles and debris fall.
Causes: 1). The scouring agent is easy to condense at room temperature. 2). When scouring with a scouring kettle, the washing is insufficient or the washing temperature is low. 3). In the continuous scouring and scouring chamber there are deposits, or too much foam in the scouring tank and the roll surface is dirty.
(5) Bleached Hole
Appearance: The matte cloth is normal. After being bleached by hydrogen peroxide, the warp yarn or weft yarn that has been judged on the cloth surface is broken to form a small hole.
Causes: Rust adheres to the surface of the cloth, or iron ions are contained in the bleach bath water. During the bleaching process of the fabric, hydrogen peroxide is rapidly oxidized to break the yarn.
(6) Skilteriness
Appearance: The fabric has irregular shades of color.
Cause: The desizing of the pre-treatment project was not fully completed.
(7) Mist
Appearance: Patchy stains, deep and shallow, contours are not obvious, shape and size are not the same, there is no concentration, and there is no certain rule.
Causes: 1) The fabric to be dyed is splashed on sewage or other medicines. 2) After the training and bleaching, they are not dried immediately, they accumulate on the truck for a long time, and some parts of the fabric are air-dried. 3). The embroidered cloth is stained with oil stains. After the embryo inspection, traces left after brushing with a strong detergent are used.
(8) Color difference
Appearance: The dyed or printed fabric, the color of the finished product dyed, or the color of the printed pattern cannot be exactly the same as that specified.
Causes: 1) The sample used for the specified color sample is too small, and the exact same color is not achieved when the sample is color proofed. 2). Weighing dyes and auxiliaries is not accurate enough when preparing dyeing solutions or printing pastes. 3) The conditions of the process and the proofing were not fully cooperated, and no empirical modification was made.
(9) Cylinder color difference
Appearance: A large number of fabrics, fractional cylinders or a cylinder several times staining, non-stained in the same cylinder, the difference of shade of colored light.
Cause: Each cylinder is of the same type, but its function will be slightly different. In the dyeing process, the conditions of each operation cannot be the same.
(10) Yin and Yang color
Appearance: dyed full-width fabric, the color of the front and back surfaces has a color difference.
Causes: 1) The squeezing roller out of the fabric edge, the direction of travel of the fabric is not in the same plane as the suction line. 2). The heat received on both sides of the fabric is different when it is pre-dried after pressing. 3). The wind speed on the two sides of the fabric is different during resin processing.
(11) Color difference
Appearance: Full-width fabric, from the left side to the right side, the color gradually darkens or becomes lighter. Comparing the two cloth edges, there are significant differences in color.
Causes: 1) The pressure suction rate of the squeezing machine roll gradually increases or decreases from left to right. 2). Roller roller or roller sculpting or poorly made print roller. 3). The pressure on the rollers of the printing roller or roller varies from left to right. 4). In the pre-drying, fixing or resin processing, the temperature or wind speed in the box is not the same.
(12) Middle and thin (Listing)
Appearance: The color of the fabric near the center of the cloth and near the center has a difference in depth.
Causes: 1). In the open cross-rolling dyeing machine, the curvature of the spreading device is not suitable, so that the cloth absorbing rate of the cloth is inconsistent. The temperature inside the bath is inconsistent with the center. Add new staining fluid unevenly. 2) In the flow dyeing machine, the fabric circulation speed is slower and the heating rate is faster. 3) In the open width dyeing machine, the suction rate at the center and ends of the roll is inconsistent. Both the temperature and the wind speed at the time of drying are not uniform at both ends and at the center. In the continuous dyeing process, the tension on the cloth body is not uniform. 4). The center of the fabric that has been formed during the pre-processing process is inconsistent with the two sides. 5) When the roller or the Rodriguez prints, the center of pressure applied is inconsistent with the two ends. 6). The resin was not processed immediately after dyeing, or it was not completely dried after the resin was applied and accumulated for a long time.
(13) Tailing of Ending
Appearance: A group of fabrics containing several or several dozens of fabrics. After continuous dyeing under the same setting conditions, the cloths that begin to be applied to the end of the fabric are different in depth.
Causes: 1). In the pre-treatment process, there is a difference in desizing, scouring, bleaching, mercerizing, and stereotypes before and after a batch of fabrics. 2). In the open cross-rolling dyeing, the dyeing rate is not uniform with the combination of dyes, the guide cloth and roll method are not appropriate, the dyes are added wrongly, and the dyeing temperature is not properly controlled, which will cause the color difference between the first and the end. 3). In continuous dyeing, the pressure suction rate changes, the stability of the dyeing fluid is not good, and the temperature during drying gradually changes. 4) Dyes and additives used in combination have poor compatibility, and uneven layers of dye particles and water may occur. Due to capillary action, water enters the fiber first, causing the concentration of the dye solution to change, causing a color difference between the first and the end. 5). When dyeing with an ice dye, the dye will gradually hydrolyze during a long period of dip dyeing, and it will also cause a color difference between the first and the end.
(14) Migration (Migration)
Appearance: As the dyed fabric dries during drying, the water contained in the fabric evaporates, and the dye moves to the surface of the fabric as the water moves, causing a change in shade of the fabric surface.
Causes: 1) The set pressure suction rate is too large. 2) When the dyeing solution is used, the dye used is excessive, ie, the concentration of the dye solution is too high. 3). Dyeing time before dyeing is too long. 4). The drying rate is too fast. 5) No transfection inhibitor added, or insufficient amount added.
(15) Dyestuff Spot
Appearance: The surface of the dyed fabric has a dark flake, a variety of shapes, and irregular spots.
Causes: 1. Improper use of dyes and auxiliaries. Dissolution and dispersion of the dye are not sufficient. 2). Dyestuffs or auxiliaries contain impurities. 3). Dyeing water hardness is too high, not using soft water, or using soft water softener.
(16) Dyeing Streak
Appearance: The yarns or yarns arranged adjacent to the dyeing fabric show differences in hue, density, and brilliance. There are only one person, and there are also several yarns that are banded. There are shorter ones and all the others.
Causes: This is a chemical problem of chemical fibers used in dyeing fabrics. This difference occurs due to the difference in dyeing properties.
(17) Instrinsic Luster Streak
Appearance: The surface of the non-fluff dyed fabric, when exposed to light, the color will appear as a strip of light or dark.
Cause: This is the physical property of the chemical fiber used in the dyed fabric. Due to the different reflectivity, absorbability, and permeability of the fiber in the fabric, differences in gloss, transparency, whiteness, etc. may occur. For example, the additives in the chemical fiber, the degree of crystallinity, the degree of orientation, and the amorphous state all affect the gloss of the fiber itself.
(18)Fabric Configuration Streak
Appearance: dyed fabrics with non-plain weaves, depending on the change of the tissue, the color of the fabric is dark, light or bright and dark.
Causes: Due to the structure of the fabric, the distribution of the interweaving points of the fabric and the arrangement relationship between the warp and the weft are different, resulting in different reflectivity and permeation of the fabric.
(19) Spacing Streak
Appearance: In the warp direction or longitudinal direction of the dyed fabric, the difference in the color of the straight strip is formed.
Causes: During the dyeing process, the warp yarns of the fabric are moved to make the arrangement density of the yarns non-uniform, and the gaps between the adjacent yarns are large or small, resulting in differences, resulting in a slight depth of vision.
(20) Carrier Spot
Appearance: Polyester fabric dyed cloth, with droplets of concentrated dyeing spots.
Causes: 1) When the polyester fiber fabric is dyed in an atmospheric pressure bath, spots are formed on the surface of the cloth after absorbing the dye due to poor dispersion of the dye-conducting agent. 2). The dye-conducting agent that volatilizes during atmospheric dyeing, condenses on the top of the device and drops on the dyed material.
(21) Warp Stripe, Yarn Texture Streak
Appearance: pieces of dyed woven fabrics, with rain-like stripes in the direction of the fabric warp. In severe cases, it can be seen on the surface of the cloth. This type of defect will show significant and inconspicuous differences due to the darkness of the test site, the direction of observation, and the distance.
Causes: 1). It is formed due to the difference in yarn count, uniformity, number of twists, and the cross-sectional shape of the yarn. 2). Improper use of dyes, especially when dyed green. 3). If the polyester processing silk fabric, improper desizing before dyeing, local residual paste, stain less when dyeing, lighter in color, and the existing warp stripes.
(22) Barry Dyeing, Filling Band in Shade
Appearance: In the weft direction of the woven fabric, or the horizontal continuous loop of the circular knitted fabric, the color after the dyeing shows a deeper or lighter ribbon.
Causes: 1). Woven fabrics have secret paths or scars. 2) When the knitted fabric is weaving, the yarn feeding tension is uneven, or the number of loops is uneven. 3). Filament yarns with the same specification and different lot numbers are used for weaving. 4). The filaments used for knitting are not uniformly heated during the heating process.
(23) Dye Spot
Appearance: 1). In the dyeing, light-colored fabric cloth, with the same color of the tiny color points. 2). On the cloth surface of bleached or light-colored fabrics, there are tiny spots of other dyes.
Causes: 1) The dye is poorly dissolved and there are still small particles that do not dissolve. 2). The dyestuffs fly in flight and fall on the fabric to be processed. 3). The mechanical equipment is not cleaned. After the dark color is processed, light color processing is continued.
(24) Rope Mark
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