4 Types of Dyeing method in Textile Industry | Texhour.com
Depending on the optic effect required in the final garment, the following can be dyed: fiber dye, yarn dye, fabric dye, garment dye.
4 Types of Dyeing method in Textile Industry
Depending on the optic effect required in the final garment, the following can be dyed:
1. Fiber Dye
2. Yarn Dye
3. Fabric Dye
4. Garment Dye
Fiber or Stock Dyeing:
• The staple fiber is dyed before the spinning process.
• The fibers are placed in large vats and the dye liquor is forced through the mass at high temperatures.
• The color deeply penetrates through the fibers and the resulting yarn is of very even color with high fastness to crocking. Wool is often stock dyed. However, there is a lot of wastage using this process.
• Fibers of separate colors can be spun together to create mélange (or heather) yarn.
• The yarn is dyed, either in the form of hanks or on cones in a package dyeing machine.
• In space dyeing, the yarn is dyed at intervals along its length, in one or more colors.
• It refers to the dyeing of the final woven or knitted fabric.
• The dyeing of blended yarns or fabrics, such as acrylic with cotton or nylon with rayon, normally requires the application of several dyestuffs, depending on the fastness requirements of the end use application. Because of the combination of different dyes and their individual processing requirements, the procedure (almost always a two-cycle dyeing – also referred to in India as double dyeing) may be lengthy and complicated, adding substantially to the cost of dyeing.
• The entire garment is placed in the dye-bath, with the resulting color having highs and lows.
Ready to Dyeing (RTD):
• The fabric is semi-bleached or bleached, but without starches, sizing or finishes which could interfere with the dyeing.
• The item may or may not be sewn with cotton thread.
• The item may or may not be cut oversize to allow for shrinkage.
Prepared for Dyeing (PFD):
• Generally speaking, a PFD fabric is washed to remove starches, sizing or finishes and is off-white in color.
• It is sewn with cotton thread (so the stitching dyes the same color).
• It is usually cut oversize because it is understood that the garment is going to be dyed and will shrink