Bleaching
Bleaching
Bleaching (/ˈbliːtʃɪŋ/) is a process that involves the removal of color, whitening, or disinfection using chemicals.
Etymology
The term "bleach" is derived from the Old English word "blǣċan" which means "to whiten". It has been in use since the 15th century.
Process
Bleaching is a process that involves the use of bleaching agents such as hydrogen peroxide, sodium hypochlorite, or chlorine. These agents work by breaking down the chemical bonds that give color to substances, resulting in a lighter color or complete whitening.
Uses
Bleaching is widely used in various industries. In the textile industry, it is used to whiten fabrics. In the paper industry, it is used to remove color from paper pulp. In the food industry, it is used to whiten foods like flour and sugar. It is also used in water treatment to disinfect water and in dentistry for teeth whitening.
Health Effects
Exposure to bleaching agents can have various health effects. It can cause irritation to the skin, eyes, and respiratory system. Long-term exposure can lead to more serious health problems like lung damage and cancer.
Related Terms
- Bleaching agent: A chemical that is used in the bleaching process to remove color or whiten.
- Oxidizing agent: A substance that can oxidize other substances, often used in bleaching.
- Reducing agent: A substance that can reduce other substances, often used in bleaching.
- Whitening: The process of making something whiter or lighter in color, often through bleaching.
External links
- Medical encyclopedia article on Bleaching
- Wikipedia's article - Bleaching
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