What is wet processing in textile industry?
Wet-Processing is the processing stage at which textile substrate is treated with colourants and/or chemicals, collectively referred to as inputs in GOTS terminology. This includes sizing, desizing, pre-treatment, dyeing, printing (including digital printing), finishing, laundry, etc.
Why pretreatment process is important for textile processing?
4. Pretreatment: Pretreatment is a heart of processing of textile. In Pretreatment, all these impurities are removed and fabric is brought to a stage where it is more absorbent and white and can be easily processed further. The process which is done to make the textile materials suitable for dyeing and printing.
What are the aims of bleaching process?
The objective of bleaching is to produce white fabrics by destroying the coloring matter with the help of bleaching agents with minimum degradation of the fiber. The bleaching agents either the coloring matter which is washed out and whiteness thus obtained is of permanent nature.
What method of bleaching is preferable?
Alkaline hydrogen peroxide bleaching is the most preferred system for polyester/cotton blends. Polyester/Wool Blends: • In general, blends containing wool and polyester fibres can be bleached with hydrogen peroxide either in acid or alkaline medium without risks of damage.
What is the universal bleaching?
In alkaline condition the chlorine of oxidizing agent react with protein fiber causes degradation of protein fiber. To overcome all these difficulties hydrogen peroxide is the solution to the dyeing masters. That’s why it is called universal bleaching agent (H2O2).
What are the methods of bleaching?
Bleaching Agents || Applicability and Application Methods of Bleaching Agents
- Ozone (O3)
- Bleaching Powder.
- Hydrogen Per Oxide (H2O2)
- Sodium Hypochloride (NaOcl)
- Sodium Chlorite (NaclO2)
- Potassium Dichromate (K2Cr2O7)
- Potassium Permanganate (KmnO4)
- Per Acetic Acid (CH3COOH)
What is bleaching your bum?
What is it? Anal bleaching is a cosmetic treatment that lightens skin around the anus. One popular method uses chemical peels or creams to break down melanin, natural pigments in the skin. These products can also reduce the number of melanin-producing cells around your anus.
Which chemical is used during bleaching process?
Sodium hypochlorite, a toxic and hazardous chemical, was used in the bleaching process at Giza Spinning and Weaving. Strong odor of chlorine was noted, resulting from the use of sodium hypochlorite in the bleaching process.
Is coffee alkaline or acidic?
With an average pH of 4.85 to 5.10, most coffees are considered rather acidic. While this doesn’t present a problem for most coffee lovers, the acidity can negatively affect certain health conditions in some people, such as acid reflux and IBS.
What kind of acid is bleach?
Sodium Hypochlorite is the active ingredient in chlorine bleach. It is found in household bleach and many other disinfectants. Sodium hypochlorite reacts with ammonia, drain cleaners, and other acids.
Why is bleach bad?
Chlorine-based bleach can damage your skin and eyes. If left on your skin, bleach can cause irritation and burning. Over longer periods of exposure, the chemical can lighten your skin pigment and permanently damage tissue. If bleach gets in your eye, it will be incredibly irritated and painful.
Is it bad to use bleach to clean?
When used properly (it should always be diluted with water before use), chlorine bleach is safe for disinfecting surfaces. It kills harmful germs and bacteria and sanitizes clothes in the laundry.
Is it safe to use bleach on your body?
Household bleach tends to contain 3–8% sodium hypochlorite. It is not usually toxic to the skin itself, but it can irritate the skin, eyes, and other parts of the body. It can be more harmful if mixed with other household chemicals, such as toilet cleaner, or if someone inhales it.