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Dyeing Process

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Dyeing Process

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Dyeing is the process of adding color to textile products like fibers, yarns, and fabrics. Dyeing is normally done in a special solution containing dyes and particular chemical material..

The most widely publicised dyeing process is in the context of textile dyeing, but now the dyeing process is used in a variety of industries like: leather, plastics, paint, printing and many others.

Dyeing Process of Leather

The process of tanning and dying leather is ancient. Primitive man was a society of hunters and gatherers who used everything they caught, which meant that after an animal was eaten, its carcass, hair, skin and organs needed to be used. Animal skins quickly putrefy, so these people had to quickly discover a way to preserve them.

Adding color to cured animal skins - or simply put, dying leather - is a part of the tanning process. The dying process is usually done in the third and final stage of a tanning process, but is sometimes done in the second stage, at the same time as the actual tanning. Tanning leather is necessary to preserve an animal skin for use in making products like purses, jackets, luggage and shoes. In ancient times, leather was used on everything from battle armor to chariot wheels.

There is a lot of scope of experimenting with the dyes on the leather. You can add designs, pictures or monograms on the leather, to make it look more attractive. However, to achieve such results you need a lot of practice.

There are mainly two different types of leather, used for making leather items. One is the aniline leather that shows the natural characteristics of the hide. The other one is the nubuck leather, which is aniline leather that has been brushed and polished to obtain the texture of a velvet. The steps to dye leather have been given below:

Selecting the Right Dye- Choose the dye on the basis of the dyed leather samples that are provided by the shop owners at the time of purchase. This is because, most of the dyes, when applied on the leather, give an altogether different color than what they seem when kept in a bottle.

Preparing the Leather before Dyeing- In order to maintain its natural color, leather surfaces are often coated with a protective covering. If this coating is not removed from the leather, then you may find the leather in a dull and mutilated condition after dyeing. Clean off coatings or any other dirt present on the leather with the help of a leather deglazer.

Application of Leather Dye- Spray water on the leather or apply it with the help of a moistened sponge. Start applying the dye, when the leather is evenly wet. While dyeing, try to keep your strokes long and to ensure an even distribution of the color all over the surface of the leather. It may happen that one coat of the dye may not give you the desired shade. In that case, you have to apply more number of coats.

Drying Process- When the surface of the leather does not have a wet look that means that the dye on the leather has dried up. On an average, it takes almost one to two hours for the dyed leather to dry. To a great extent, the drying time depends on the type of the leather to be dyed. During this time, you need to flex the leather a number of times, in order to loosen up its fibers. In this way, you can prevent the leather from stiffening up.

Final Touch- Giving final touch to leather is most important. The next step that follows drying, is buffing up the leather with the help of a soft, clean cloth for removing the extra dye present on the leather. It also helps the leather to get a polished look. Finally, you have to coat the dyed leather with leather finish. Leather finishes are available in spray cans. You can directly spray it on the leather surface or apply it with the help of a wool dauber. The finish should spread on the surface evenly.

Inkjet Manufacturing Process

The manufacturing of inkjet process involves the following:
Considerations in the manufacturing process
The following points are vital in the manufacturing of inkjet and needs to be particularly taken care of:
The diagram illustrates a typical dye based ink formulation

Dyeing Process

Textile Dyeing Process

Dyeing is a method which imparts beauty to the textile by applying various colors and their shades on to a fabric. Dyeing can be done at any stage of the manufacturing of textile- fiber, yarn, fabric or a finished textile product including garments and apparels. The property of color fastness depends upon two factors- selection of proper dye according to the textile material to be dyed and selection of the method for dyeing the fiber, yarn or fabric.

Textile Dyeing Process

The following figures illustrate with process flow diagrams the whole operation of finishing processes and how the dyeing process is a part and parcel of the process of textile making.

Materials used in the Textile Dyeing Process

Materials that are used in textile dyeing process include water, fibre, yarn or cloth. Further, these include a host of process chemicals like:

Methods of Textile Dyeing

Color is applied to fabric by different methods of dyeing for different types of fiber and at different stages of the textile production process. These methods include: Direct dyeing, Stock dyeing, Top dyeing, Yarn dyeing, Piece dyeing, Solution pigmenting or dope dyeing, Garment dyeing etc.

Textile materials are generally dyed using two processes. They are the following:
The following chart gives a comparison between batch dyeing and continuous dyeing

Dyeing Process

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