What is the process of bleach?

Bleach works by releasing oxygen molecules in a process called oxidation. The oxygen molecules released by bleach break up the chemical bonds of chromophores. The changed chromophore molecules either reflect no color or a color outside the visible spectrum.

What are the aims of bleaching process?

The main objectives of bleaching are to get a sufficiently high and uniform degree of whiteness in the textile materials. To get a high and uniform absorptivity in the textile materials. Bleaching agent occur some damage to the textile materials. So bleaching must be accompanied with minimum fiber damage.

What element is used in bleaching textiles?

Hydrogen peroxide is commonly used to bleach cotton cloth, with sodium chlorite and sodium hypochlorite as alternatives. Wood and animal fibres are bleached by acidic reducing agents such as sulfur dioxide.

Which bleaching agent is mostly used in textile industry?

Sodium hypochlorite (NaOCl) Bleaching: Sodium hypochlorite is the strongest oxidative bleach – used in textile processing.

What are the two types of bleach?

There are only two main types of bleach to choose from when you are deciding which bleach to use on your laundry: chlorine bleach and oxygen bleach. However, there are also natural items that have bleaching power and can act as bleaching agents.

What is bleaching in fabric?

Bleaching is the process of decolorization of raw textile material by removing inherent and or acquired coloring components from the fiber. It provides base whiteness to the textile material which could be further whitened with the help of optical brighteners or dyed | printed depending on the desired end use.

What is the universal bleaching?

As the aim of bleaching is the destruction of natural coloring matters to produce pure, permanent and basic white effect. That’s why it is called universal bleaching agent (H2O2).

Is chlorine a bleach?

Chlorine is chlorine, so the chlorine in bleach is the same as the chlorine in drinking water and in a swimming pool. In fact, you can use chlorine bleach to treat a swimming pool or to treat drinking water. Chlorine is used in pools and drinking water because it is a great disinfectant.

Is bleach an activator?

Bleaching agents, usually peroxides, are usually sufficiently active only from 60 °C on. With bleach activators, this activity can already be achieved at lower temperatures. Bleach activators react with hydrogen peroxide in aqueous solution to form peroxy acids, they are a component of most laundry detergents.

What is bleaching in textile design?

What is the oldest and cheapest method of bleaching?

sulphuring
The process is called “sulphuring,” and is the oldest and cheapest method of bleaching wool. It was already practised in the Middle Ages on very much the same principles as it is to-day, and no operation in bleach- ing has changed so little during the centuries.

What are the functions of bleaches in textile?

Bleaching is an important and essential step in pretreatment of Textiles. It helps ‘whiten’ the textile material by removing undesired inherent coloring components.

How is bleaching used in the textile industry?

The process by which the natural color of a fiber can be removed and make the textile materials pure white and bright is termed as bleaching. There are some key purposes of bleaching in the dyeing industry which are mentioned below:

Which is the best definition of the bleaching process?

Bleaching process can be defined as; the destruction of natural coloring matter from the textile materials in order to achieve a clean white end product. Different types of bleaching agent use during bleaching.

What is the process of bleaching of wool called?

Scouring removes all the waxes, pectins and makes the textile material hydrophilic or water absorbent. See also scouring wool . The next process of decolorization of greige material into a suitable material for next processing is called bleaching. Bleaching of textiles can be classified into oxidative bleaching and reductive bleaching.

When do you need to bleach a fabric?

White fabric colored with dyes. Sometimes we want to get a white fabric; which is obtained by bleaching process. After scouring process bleaching is done for get white fabric. Bleaching is done for removing natural color which is inherent in the fiber.