Wet processing obeys an important duty to do in textile industry. Wet processing classified in three divisions in a short description. Because there are multiple divisions on those points are given below.
- Pr-treatment
Pr-treatment means preparation process. Before taking any necessary and important process like dying on a fiber or yarn has to do some preparation process called per-treatment. Pr-treatment makes the material as it can color as much as easy way. Basically this process used acid, salt, oxidizing agent, reducing agent, enzyme, wetting agents and many more. Selection of wet processing elements and temperature are decided by expert engineers according to the machinery are used in dying or wet processing floor.
- Dyeing and printing
- Dying
Dying is a process where fiber, yarn or fabrics are colored by water and dyestuff is called dyeing. All this dying process done by penetration technique as it can spread all over the surface of the raw material. The dye can be different and change by the properties and category of that fabric is used to. The application of dyeing is depend on hue, tone, brilliancy, fastness, affinity, solubility and many more properties. Dye is a colored material which is built by chromophore and auxochrome group.
Basically we get some dyestuff in market.
- Direct Dyes
- Basic Dyes
- Acid Dyes
- Sulpher Dyes
- Reactive Dyes
- Vat Dyes
- Azoic Dyes
- Disperse Dye
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- Printing
Printing technique let us create custom design with different color on a fabrics land. In a single word “Printing means make a design with different color and shape on a fabric as it mention some think as people can accept it”. There are few printing technique are used to complete printing process. Following style are given below.
- Direct Style
- Dyed Style
- Resist Style
- Discharge Style
- Finishing
After complete bleaching dying and printing one step is left to get the final product that is finishing. Generally the type and quality of finishing is depends on buyer, customer or present market status. Actually the aim of finishing is increasing the fineness and comfort ability. Sometime finishing also depend on the purpose of the fabric are used to.
Generally two ways to finishing the fabric
- Mechanical Finishing
Calendaring, Sanforization, Embossing, is the example of mechanical finishing.
- Chemical Finishing
Merchandising, water proofing, fire proofing, is the example of chemical finishing.
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