1. Hairy ends caused by poor cotton yarn blending and inadequate pre-dyeing treatment.
a. The semi-finished product can be lightly dusted before being mercerized; in severe cases, it needs to be brushed lightly before being mercerized.
b. The finished fabric needs to be stripped, then brushed, mercerized, and colored.
c. If the finished product needs to be washed, the hairy head can be removed or lightened during washing.
2. How to deal with the curling phenomenon of elastic fabric
a. Use a small tank or cold pile for pre-treatment.
b. When making a long car, add more cloth clips after cooking, and do mercerization and dyeing after 1 to 2 passes of shaping.
3. The weight of the finished product is reduced
a. Excessive alkali concentration and excessive processing temperature cause damage to yarn fibers.
b. The finished door width is too wide.
c. Excessive pre-processing stretching causes a reduction in weft density.
4. Gray cloth becomes moldy
a. When the color of the mildew spots is particularly light, you can do some light coloring and try not to bleach it.
b. Depending on the depth of the mildew spots, make some medium to dark colors. Generally speaking, the darker the color, the better.
c. It cannot be used when the mildew stains are severe and affect the strength of the gray fabric.
5. When dyeing sensitive colors, the cloth surface will show uneven color absorption caused by poor yarn dryness.
Do the pre-processing again to make the yarn fully bulky before dyeing.
6. Things that should be paid attention to when blowing three silk threads on the sanded colored cloth
a. To prevent the wool from blowing off the cloth, use other pieces of cloth to cover both sides of the three threads before blowing.
b. If the cloth surface becomes shiny or has a weakened wool feel, you can use fine sandpaper to gently polish the cloth surface to make it fluffy.
7. Color printing on the weft yarn of gray fabric (ring spinning)
a. In order to distinguish the spinning quality of each production class, the gray cloth factory must mark each dropped weft yarn with a color. The colors are bright red, blue, green, purple, etc. This color is fadeable and does not affect post-processing.
b. Test method: 1) Pour freshly boiled water on the color mark, the color mark will disappear by itself. (2) The pre-printing and dyeing treatment will disappear by itself when exposed to high temperatures.
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