1. Dyeing of loose fibers Before spinning, the fibers or loose fibers are dyed into a large dye vat and dyed at an appropriate temperature. Color spinning mostly adopts the method of loose fiber dyeing (also has the effect of single dyeing of different fibers), which is often used for woolen fabrics.
2. Top dyeing This also belongs to the fiber dyeing before the fiber is formed into yarn. The purpose of the dyeing of the loose fiber is to obtain a soft color mixing effect. Top dyeing is generally used for combed yarns and wool fabrics.
3. Yarn dyeing Dyeing the yarn before weaving, generally used for dyed fabrics, sweaters, etc. or directly using yarn (sewing thread, etc.). Yarn dyeing is the basis of dyeing and weaving. There are three methods of conventional yarn dyeing:
① Hank yarn dyeing - immersing loose hank yarns in a special dye vat, which is the most expensive dyeing method;
②Cheese dyeing - the yarn dyed in the bobbin is wound on a perforated bobbin, and then many bobbins are put into the dyeing tank, and the dye liquor circulates, and the fluffy effect and softness are not as good as skein dyeing.
③ Warp beam dyeing - is a large-scale package dyeing. Before weaving is made, the warp beam (warping) must be made, and the yarn of the entire warp beam is dyed, such as combined sizing and dyeing machine and warp beam yarn. Bunch dyeing. Because it is a warp beam, it is mostly suitable for woven dyeing. But with the emergence of warp beam doffing, we can doff the yarn on the warp beam after dyeing into cheese yarn. This dyed yarn can be used in a wider range. For example, the reduction dyeing method mostly used in indigo dyeing can only use Beam dyeing can be a good solution, if there is no beam doffing, it is difficult to achieve.
4. Piece dyeing The method of dyeing fabrics is piece dyeing. Commonly used methods are rope dyeing, jet dyeing, jigging, pad dyeing (not tie dyeing) and beam dyeing. Not introduced here.
5. Garment dyeing Put the garment into nylon bags, and put a series of bags into the dye vat together, and keep stirring in the dye vat (paddle type dyeing machine). Garment dyeing is suitable for most knitted garments such as knitted socks, T-shirts, sweaters, pants, shirts and other simple garments.
