3. Belong to the reason of printing and finishing
(1) Gasoline Spot (2) Bumang (Fuzz, Nap)
(3) Inperfect Penetration Of Dye (4) Refined spots
(5) Bleached Hole (6) Skilteriness
(7) Mist (8) Color difference
(9) Cylinder color difference (10) Yin and Yang colors
(11) Left and right color difference (12) Medium rare, medium dense (Listing)
(13) Tailing of Ending (14) Migration (Migration)
(15) Dyestuff Spot (16) Dyeing Streak
(17) Instrinsic Luster Streak (18) Dyeing Texture Streak (Fabric Configuration Streak)
(19) Spacing Streak (20) Carrier Spot
(21) Warp Stripe (Yarn Texture Streak) (22) Barry Dyeing, Filling Band in Shade
(23) Dye Spot (24) Rope Mark
(25) Padding Mark (26) Moire
(27) Uneven Dyeing on Selvage (28) Fading of Selvage or Discoloration
(29) Edge Mark (30) Hot Mark
(31) Colored Spot (Colored Spot) (32) Foam Pollution (Scum Spot)
(33) Tarring Strining (34) Roller pollution
(35) Chemicals Staining (36) Dyeing Stop Mark
(37) Color spots (38) Blurred pattern
(39) Out of version (40) Lack of pulp
(41) Print break (42) Print crease
(43) Plug version (44)
(45) Pollution of printing paste barrel (46) Scraper pollution
(47) Printing cable (48) Printing trail
(49) Print jump knife (50) Bad connection
(51) Pollution of base fabric seams (52) Printing Stop Mark
(53) Water rolling marks (54) Hair spots
(55) Resin spots (56) Surface resin
(57) wool ball (58) split yarn
(59) shiny cloth (60) uneven cloth
(61) Poor elasticity (62) Paper feel (Paper Like)
(1) Gasoline Spot
Appearance: It mostly occurs in E / R blended fabrics. After dyeing, there are spots of oil droplets, which are slightly darker than the normal parts. Observed with a magnifying glass, the plush in the dark parts of the fabric has tiny beads at the tip, and it is more than the normal plush.
Causes:
This is due to uneven singeing. In the dark spots of the stains, the fleece cannot be fully burned off, becoming melted at the tip, and the color absorption is strong, so the dyeing is thick.
(2) Fuzz, Nap
Appearance: After dyeing and finishing the fabric, the fabric still has fine plush, which is different from the color of the fabric.
Causes:
1. The singeing is not enough, and the hairiness on the cloth has not been completely burnt off.
2. When dyeing with a liquid-flow dyeing machine, the jet of the nozzle is too strong.
(3) Inperfect Penetration Of Dye
Appearance: The fabric surface after dyeing is colored cloud of shade.
Causes:
1. The desizing, refined pulp is not enough, or the wax and other substances removed by the treatment, and then attached to the fabric.
2. When bath dyeing, the bath ratio is too small, and the heating rate is too fast, which makes the dyeing solution gelatinized.
(4) Appearance of scouring spots: During the scouring process, the non-fibrous substances in the scouring fabric are combined with the scouring agent, and then the plush falling from the fabric is mixed, and then adheres to the fabric surface. There are irregular flake yellowish traces on the surface of the cloth, and when it is lightly scraped with nails, short plush and debris will fall.
Causes:
1. The scouring agent is easy to coagulate at room temperature.
2. When scouring with a scouring kettle, the washing is not enough, or the temperature of washing is low.
3. In continuous refining, deposits accumulate in the refining chamber, or there is too much foam in the refining tank and the surface of the roller is unclean.
5) Bleached Hole
Appearance: The embryonic fabric is normal. After bleaching with hydrogen oxide, the warp or weft yarns on the fabric are broken, forming small holes.
Causes:
There is rust on the fabric surface, or iron ions are contained in the bleaching bath water. During the bleaching process of the fabric, it is rapidly oxidized with hydrogen peroxide to break the yarn. (6) Color flower (Skilteriness)
Appearance: The surface of the cloth has irregular flaky color shades.
Causes:
The desizing of the pre-treatment project and the refining could not be done thoroughly.
(7) Mist
Appearance: flake-like stains, with deep and shallow spots, inconspicuous contours, different shapes and sizes, where the occurrence is not concentrated, and there are no certain rules.
Causes:
1. The fabric to be dyed is splashed with sewage or other medicines.
2. It is not dried immediately after practice and bleaching. It is accumulated on the cloth car for a long time, and some fabrics are water-dried.
3. The embryonic cloth is contaminated with oil stains, and the traces remaining after scrubbing with a strong detergent during embryo inspection.
(8) Color difference appearance: dyed or printed fabrics, the color of the finished product dyed, or the color of the printed pattern cannot be exactly the same as specified.
Causes:
1. The sample used for the specified color sample is too small, and the same color cannot be obtained when the color is checked after proofing.
2. When preparing dyeing liquid or preparing printing paste, weighing dyes and additives is not accurate enough.
3. The conditions of the manufacturing process and the proofing are not fully matched, and no empirical corrections have been made.
(9) Appearance of color difference of different cylinders: fabrics in large batches can be dyed in fractional cylinders or several times in one cylinder. Those who are not dyed in the same cylinder have different shades of colored light.
Causes:
Although the cylinders are of the same type, their functions will be slightly different. In the dyeing process, the conditions of each operation are not the same.
(10) The appearance of yin and yang colors: dyeing the full width of the fabric, there is a color difference between the front and back colors.
Causes:
1. The fabric edge of the pressure dye roll is not in the same plane as the pressure line.
2. The heat received on both sides of the fabric during pre-drying after press dyeing is different.
3. When the resin is processed, the wind speed on the two sides of the fabric is different.
11) Appearance of left and right chromatic aberration: The full-width fabric gradually becomes darker or lighter from the left to the right. The two fabric edges are folded and contrasted, and the color is significantly different.
Causes:
1. The pressure absorption rate of the roller of the press dyeing machine gradually increases or decreases from left to right.
2. The roller or roller outline of the printing roller is poorly carved or made.
3. The pressure on the printing roller or steel roll is different.
4. During pre-drying, color fixing or resin processing, the temperature and wind speed in the left and right of the box are different.
(12) Medium rare, medium dense (Listing)
Appearance: The color of the fabric near the fabric edge and near the center has a difference in shades.
Causes:
1. In the open-width cross-rolling dyeing machine, the curvature of the cloth spreading device is not suitable, so that the rate of cloth absorption of dye liquor is inconsistent. The temperature in the dye bath is not consistent with the center at both ends. Adding new staining solution is uneven.
2. In the liquid flow dyeing machine, the fabric circulation speed is slower, and the heating rate is faster.
3. In the open-width continuous dyeing machine, the pressure suction rate at the center and the ends of the roll is inconsistent. During drying, the temperature and wind speed are not uniform at both ends and the center. In the continuous dyeing process, the tension on the cloth body is not uniform.
4. The center of the fabric formed during pre-processing is inconsistent with both sides.
5. When the roller or Luo Dali prints, the pressure applied on the center is not consistent with the two ends.
6. The resin was not processed immediately after dyeing, or was not completely dried after being applied with resin, and accumulated for a long time.
(13) Tailing of Ending
Appearance: A group of fabrics with several or several tens of culprits, after continuous dyeing under the same set of conditions, the fabric scalles beginning and ending with dyeing, the color has a difference in shades.
Causes:
1. In the pre-treatment process, there are differences in desizing, scouring, bleaching, mercerizing, setting, etc. for a batch of fabrics before and after occurrence.
2. In open-width cross-roll dyeing, the dyeing rate of the combined dyes is inconsistent, the guide cloth and the roll method are inappropriate, the dye is added incorrectly, and the dyeing temperature is not properly controlled, which will cause the first and last color difference.
3. During continuous dyeing, the pressure absorption rate changes, the stability of the dyeing solution is not good, and the temperature during drying gradually changes.
4. If the compatibility between the dye and the auxiliary agent used is poor, an uneven layer of dye particles and water will occur. Due to capillary action, water first enters the fiber, causing the concentration of the dyeing solution to change, resulting in a color difference between the first and the last.
5. When dyeing with ice dye, the dye will gradually hydrolyze during the long-term dip dyeing process, and it will also cause color difference between the first and the last.
(14) Migration
Appearance: When the dyed fabric is dried, the moisture contained in the fabric evaporates, and the dye moves to the surface of the fabric as the water moves, so that the color tone of the fabric surface changes.
Causes: 1. The pressure suction rate set during pressure dyeing is too large.
2. When blending the dyeing solution, the amount of dye used is excessive, that is, the concentration of the dyeing solution is too high.
3. After dyeing, it is left for too long before drying.
4. The drying rate is too fast.
5. No migration inhibitor is added, or the amount added is insufficient.
(15) Dyestuff Spot
Appearance: The surface of the dyed fabric has large flakes with darker colors, different shapes, and irregular positions.
Causes: 1. Improper use of dyes and additives. The dye dissolves and disperses insufficiently.
2. Dyestuffs or additives contain impurities.
3. The hardness of dyeing water is too high, soft water is not used, or softener using soft water is not appropriate.
(16) Dyeing Streak
Appearance: The yarn or yarn group arranged adjacent to the dyed fabric has differences in hue, density and gorgeousness.
There is only one, and there are a few yarns into a ribbon. There are shorter lengths, and there are also full culprits.
Causes:
This is a chemical problem of chemical fibers used in dyed fabrics, and this difference occurs due to the difference in dyeability.
(17) Instrinsic Luster Streak
Appearance: When the surface of the non-fluff dyed fabric is directly irradiated with light, the color will appear as a strip of light or dark.
Causes:
This is a physical property problem of chemical fibers used in dyed fabrics. Due to differences in the light reflectivity, absorption, and transmission of fibers in fabrics, gloss, transparency, and whiteness are different in observation. For example, the additives, crystallinity, alignment, non-crystalline state, etc. in the chemical fiber will affect the gloss of the fiber itself.
(18) Dyeing texture spot (Fabric Configuration Streak)
Appearance: Dyed fabrics with non-plain weave, according to the change of tissue, the color of the fabric can be dark, light or light 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 weft yarns are different, resulting in different reflectivity and permeability of the fabric to light.
(19) Spacing Streak
Appearance: In the warp or longitudinal direction of the dyed fabric, it is a straight bar with a difference in color shade.
Causes:
During the dyeing, the warp yarns of the fabric move, making the arrangement density of the yarns uneven, and the gaps between adjacent yarns are large or small, resulting in differences, resulting in shallow and deep vision.
(20) Carrier Spot
Appearance: Polyester fiber fabric dyed cloth surface with drop-shaped thick dye spots.
Causes:
1. When dyeing polyester fiber fabrics in an atmospheric pressure bath, spots are formed on the fabric surface after dye absorption due to poor dispersion of the dye guide.
2. The vapour guide agent that volatilizes during normal-pressure dyeing will condense on the top of the machine and drip onto the dyed object.
Appearance: Dye-dyed woven fabric with rain-like stripes on the warp direction. In severe cases, it can also be seen on the fabric of the embryo. Such defects, depending on the lightness and darkness of the inspection site, the direction of observation, and the distance between them, will show significant and insignificant differences.
Causes:
1. It is formed due to the difference in the count, uniformity, twist number and cross-sectional shape of the yarn for weaving.
2. Improper use of dyes, especially when dyeing green.
3. If it is a polyester processed silk fabric, the desizing treatment before dyeing is improper, and some paste remains locally. It is less colored during dyeing, and the color is lighter, and the existing warp stripes are displayed.
(22) Barry Dyeing, Filling Band in Shade
Appearance: In the weft direction of the woven fabric, or the horizontal continuous loops of the circular knitted fabric, the color is darker or lighter after dyeing.
Causes: 1. The woven fabric has dense roads or rare defects.
2. When weaving knitted fabrics, the yarn tension is uneven, or the number of loops is uneven.
3. When weaving, use the same type of chemical fiber yarn with different batch numbers.
4. The chemical fiber yarn for knitting, the temperature in the heating process is not uniform during the silk processing.
(23) Dye Spot
Appearance: 1. In dyeing and light-colored fabrics, there are tiny color points of the same color.
2. On the surface of bleached or light-colored fabric, there are tiny spots of other dyes.
Causes: 1. Poor dye dissolution, there are still tiny particles not dissolved.
2. Dyeing occurs during the handling of the dye and falls on the fabric to be processed.
3. When the mechanical equipment is not cleaned, after processing the dark color, continue to process the light color.
(24) Rope Mark
Appearance: When the rope is dyed, the fabric shrinks into a rope. After dyeing, the fabric surface has irregular colors and wrinkles along the length of the fabric.
Causes:
When dyeing with Wenqi or liquid flow dyeing machine, the fabric is not pre-formed or insufficiently set. During the dyeing, the scroll bar malfunctioned and stopped running. Suddenly increase or decrease the temperature. The dyeing bath is too small. The fabric is knotted in the tank, etc.
(25) Padding Mark
Appearance: When the width of the woven fabric is pressed and dyed, the fabric is folded in the bath direction between the two rolls. When passing through the pressure line, the pressure absorption rate varies due to the difference in thickness. The folded part is slightly lighter than normal. Occurs mostly in the two heads of a fabric.
Causes: 1. The fabric to be pressed and dyed has creases in the pre-treatment process, which cannot be completely eliminated during shaping.
2. The spreader of the cloth feeding device of the press dyeing machine fails, and the fabric cannot be opened.
3. The indirect joints between scabies and scabies are poor, and there is a phenomenon of shrinkage or irregularity.
(26) Moire
Appearance: The surface of the dyed fabric shows wood-like glossy spots.
Causes: 1. When the warp beam is dyed, the shrinkage of the fabric is too large, causing the roll layer to move.
2. When the warp beam is dyed, the roll is placed too tightly, resulting in abnormal circulation of the dyeing solution.
(27) Uneven dyeing on selvage
Appearance: The fabric edge after dyeing has a color different from the cloth surface.
Causes:
1. The edge of the fabric is too loose or too tight.
2. When setting before dyeing, the fabric edge is clamped by the high temperature splint.
3. Hemming of the cloth edge occurs during dyeing.
4. When the open width is dyed, the winding is uneven, and the edge of the fabric is oxidized.
5. Insufficient reduction during open-curved vulcanization or vat dyeing.
6. The pressure absorption rate of the cloth edge and the cloth surface is not consistent during the open-width press dyeing.
7. Washing after dyeing is not enough, and medicines remain on the edge of the cloth.
(28) Fading of Selvage or Discoloration
Appearance: The finished fabric after printing and dyeing, the color of the cloth edge is different from the normal one.
Causes: 1. When the resin is processed, the temperature of the needle plate or the splint is too high, and the dye sublimates and escapes.
2. When using rotary cylinder dryer to dry the fabric, the temperature is too high, the cloth edge is too tight around the cloth cylinder.
(29) Edge Mark
Appearance: Refers to the cylindrical knitted fabric, where the cylindrical flat fold is turned on both sides, showing abnormal dyeing.
Causes: 1. The oil added during weaving deteriorates.
2. The impregnated cloth is stored improperly or for too long, and the edge of the cloth is deteriorated or polluted by the action of air and sunlight.
3. When setting the cylinder, the setting frame temperature is too high.
(30) Scald appearance: the fabric surface of the dyed fabric has large creases with lighter coloration, the area is different, the direction is not fixed, and it mostly occurs in E / C blended shuttle fabrics.
Causes:
Due to the use of conveyor belt continuous bleaching machine, the machine is filled with saturated steam, the stainless steel conveyor belt is dried up at high temperature, and closely adheres to the fabric folded on it, so that the fabric reduces its color absorption due to less.
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