I. Outlining the yarn

It refers to the defect formed on the fabric surface when the yarns of the fabric are hooked by sharp objects. Once such anomalies occur, they are basically irreparable. The main point of the appearance is to ensure that there are no sharp burrs in the areas through which the fabric passes, such as the fabric cart, the machine, the hands of the operator, etc. Regular checks must be paid attention to. Some operators have more calluses on their hands, which can easily cause yarn entanglement on some light and thin fabrics.

Ii. Dirtiness

This doesn't need an explanation either. The main causes are that the operator accidentally drops the cloth on the ground during operation or fails to clean the cloth cart thoroughly, etc. Another reason is that some oil stains on the cloth table fall onto the cloth. The main point is to pay attention to the cleanliness and hygiene of the workshop, fabric carts and machines, especially when producing some light, white and bright colors.

Iii. Color Stains

It refers to a plain-colored fabric being stained with one or more colors. This is mainly due to contamination of the fabric or staining in other cases. Just pay attention to the cleaning work of the fabric cart before use and cover it after the fabric comes out.

Four. Color Dots

It refers to the point-like flaws on the surface of plain-colored fabrics, with a darker color. This type of anomaly is rather difficult to fix and is generally only used for color modification. The main causes are as follows: During the dyeing process, the dye is not thoroughly dissolved, the dissolution is insufficient, or there is color staining inside the dyeing cylinder, or the temperature rises too quickly, resulting in uneven dyeing. The solution also starts from these aspects: when dissolving the materials, stir thoroughly. When adding materials, filter them through a filter screen with a mesh size of 300 or more, and select a reasonable temperature rise curve. Select the appropriate leveling agent for dyeing.

V. Color Stains

Color traces have more flaws than color dots and present similar conditions. The main difference between general color stains and oil stains lies in that when the fabric is dry, oil stains give the impression that there is water on the fabric surface, but in fact, it is dry. Oil stains are mainly formed due to the adsorption of dyes by oil on the fabric surface. During weaving, a small amount of oil is added to some chemical fibers. Under normal circumstances, these oils can decompose automatically when they come into contact with water and will not affect dyeing. However, some weaving factories use poor-quality fabric oil in order to cut costs, thus causing flaws during dyeing. Another reason for the abnormal occurrence is the excessive accumulation of impurities in the dyeing VAT. The main sources of these impurities are the oil on the fabric surface, the oil in the dyeing and chemical auxiliaries, etc. The continuous deposition in the dyeing VAT led to the occurrence of the abnormality. This situation mainly involves strengthening the regular cleaning and rinsing of the dyeing VAT.

Six. Colored Flowers

Color patterns are one of the common abnormalities in plain dyed fabrics, mainly manifested as inconsistent colors on the fabric surface, giving a printed feel. The main causes include unreasonable combination of dyeing formulas, improper selection of dyeing temperature rise curves, and excessive addition of materials, etc. The solution is to choose a reasonable formula combination. Generally, dye suppliers will provide reasonable combinations. Select a reasonable temperature rise curve based on the dye formula combination, the color of the fabric, and the amount of dye added to the cylinder. The same goes for adding materials. The speed of adding materials later should be selected and should not be too fast.

Seven. Yin-yang Disparity

It refers to the fact that the colors of the front and back sides of the fabric are not the same. Sometimes, this phenomenon is caused by the different yarn counts used on the front and back sides of the fabric. Another issue is that the uniform dyeing property of the dye is not good enough, which leads to the problem. The latter situation is less common while the former is more frequent.

Eight. Poor on the sides

It refers to the situation where the color of the fabric edges and the middle is consistent. The main reason for this is that during dyeing, due to the effect of tension, the fabric edges curl up, resulting in insufficient even dyeing. If the fabric shows very severe curling at the edges after weaving, the pre-determined process can be chosen. If it's not very serious, you can boil the edges first and then dye them. However, after boiling, be sure to pull out the fabric surface to check if it has boiled thoroughly. This issue is also related to the dyeing equipment.

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