Wet dyeing refers to the process of dyeing fabrics or yarns while they are in a wet state, typically after they have been pre-treated with water or another liquid medium. This type of dyeing involves immersing the fabric in a dye bath where the fabric absorbs the dye. The process is usually carried out in large machines or vats and is characterized by the fabric being wet throughout the dyeing process.
Wet dyeing is commonly used for dyeing fiber, yarn, and fabric in bulk and is one of the most traditional and widely used methods in textile manufacturing. The method can be done using different types of dyeing techniques such as batch dyeing, continuous dyeing, and piece dyeing. The fabric is typically treated with water, heat, and the appropriate dye to achieve the desired color and effect.
Types of Wet Dyeing :
- Batch Dyeing: In this method, a batch of fabric or yarn is dyed all at once in a dye bath. The fabric is thoroughly immersed in the dye solution, and the dye penetrates the fibers, resulting in a uniform color.
- Continuous dyeing: This involves the continuous feeding of fabric into a dyeing machine. The fabric passes through several stages, including application of dye, steaming, and washing, to ensure the dye is absorbed uniformly.
- Piece Dyeing: Piece dyeing involves dyeing whole fabric pieces (typically rolls of fabric) in a single dye bath, often after they have been woven or knitted. This is used to achieve uniform color across large quantities of fabric.