After reading this article you will learn about the quality of water suitable for laundry work. Hard Water: The presence of some of the important dissolved impurities in water makes it unsuitable for washing of clothes. These dissolved impurities are compounds of calcium, magnesium and iron salts in water. They cause hardness in water which is called hard water. Hardness [...]
In this essay we will discuss about the process of dry cleaning of a fabric. Washing or cleansing of fabrics may be possible by two processes: (1) Wet cleaning: Cleansing with water and soap or detergent. (2) Dry cleaning: Cleansing with grease solvents and absorbent other then soap solution and water. Some fine, rich and expensive fabrics lose their lustre, [...]
After reading this article you will learn about:- 1. Meaning of Detergents 2. Advantages of Detergents 3. Disadvantages. Meaning of Detergents: Detergent is "a product which is capable of cleansing" as per Dictionary. So any substance which has cleansing action is known as detergent. Soap is also a type of detergent. Today the synthetic detergents comprise thousands of different compounds [...]
After reading this article you will learn about:- 1. Meaning of a Soap 2. Composition of a Soap 3. Properties 4. Action 5. Manufacture 6. Types. Meaning of a Soap: Soap is the best cleansing agent for washing of fabrics from a long period of time. The discovery of soap has brought a revolutionary change in the field of laundry. [...]
This article throws light upon the nine main varieties of soaps used in laundry work. The soaps are: 1. Bar Soaps 2. Neutral Soaps 3. Toilet Soaps 4. Disinfectant Soaps 5. Solvent Soaps 6. Shaving Soaps 7. Soap Solution 8. Soap Flakes 9. Soap Powders. Variety # 1. Bar Soaps: These are hard soaps which are generally used for cleaning [...]
Though soap is a type of detergent, there are some differences between soap and present day soapless detergents: 1. The Chief constituent of soaps are fats or oils and alkalies. But the chief constituent of detergent is an inexhaustible material known as hydrocarbons or petrochemicals. 2. Soap preparation is expensive and the production process is different and a lengthy process. [...]
After reading this article you will learn about the application of pressure for removing dirt from clothes. The applications are: 1. Application of Friction 2. Application of Light Pressure 3. Application of the Principles of Suction 4. Washing Machine. 1. Application of Friction: Friction is applied for washing of cotton, linen, and other strong materials. Friction may be applied by [...]
Some of the important washing equipments used in laundry are: 1. Tubs and Buckets 2. Boilers 3. Bowls and Basins 4. Scrubbing Board 5. Scrubbing Brush 6. Suction Washer 7. Washing Machine 8. Finishing Equipment 9. Irons 10. Ironing Board or Table. Equipment # 1. Tubs and Buckets: These are very much essential for washing of fabrics. They are used [...]
After reading this article to learn about the methods of washing and finishing of cotton, silk and woolen garments. Laundering of clothes consists of two processes: 1. The process of removing dirt. 2. The process of finishing them to regain the appearance of neatness of a new fabric. The process of washing and finishing includes sorting, pretreatment, soaking or steeping, [...]
Read this article in Hindi language to learn about the meaning, definition and laws of growth of a child. वृद्धि का अर्थ: (Meaning of Growth) वृद्धि से तात्पर्य है: शरीर की लम्बाई तथा भार में वृद्धि होना । अत: शरीर का आकार व भार बढ़ता है । विकास शारीरिक विकास तक ही सीमित नहीं रहता है । विकास लगातार परिवर्तित [...]