dafen oil painting village

Non-metallic coatings include painting, varnishing tarring, plastic coating, oiling, greasing, enamelling etc. As matter of fact, every housewife knows that applying a thin layer of oil on the surface of iron utensils and implements will prevent their rustin..

Colloids have uses in our daily life as well as in various industrial processes. Some of the applications where colloids are present are listed below. 1) Pharmaceutical industry makes use of colloidal solution preparation in many medicines. A wide variety of medicines are emulsions. An e..

Surface tension of oil is lesser than that of water. Therefore, oil spreads on water. Cleansing action of detergents is based on the fact that when soap is added to water, the force of adhesion between soap water and the fabric increases and this reduces the surface tension..

The metal surface is not allowed to come in contact with moisture, O 2 and CO 2 . i) Coating the metal surface with paint. ii) Applying oil or grease. iii) Electroplating with non-corroding metals like Ni, Cr, Al, Sn, Zn. iv) Coating with alkaline phosphate (anti rust) solutio..

Lamp Black is also known as Soot. Soot is obtained by the incomplete combustion of carbonaceous, fuels, especially oil fuels, in limited supply of air. The soot settles on the cooler parts of the chamber, and can be collected by scrapping it (Fig.10.5). It is used in the manufacture of pr..

Polaroids polarize light. A number of needle shaped crystals quinine iodosulphate with their axes parallel to one another are packed between two sheets of plastic. This arrangement serves as the polaroids. The important uses are: These reduce excess glare and hence sun glasses are fitted with Pol..

Colloids have uses in our daily life as well as in various industrial processes. Some of the applications where colloids are present are listed below. 1) Pharmaceutical industry makes use of colloidal solution preparation in many medicines. A wide variety of medicines are emulsions. An example is C..

Foods [starch, sugar, fats, vitamins, proteins] Fuels [wood, coal, alcohol, petrol] Household and commercial articles [paper, soap, cosmetics, oils, paints] Textile fabrics [cotton, wool, silk, linen, rayon, nylon] Drugs and disinfectants [penicillin, quinine, aspi..

Industrial and municipal waste waters and mine run offs cause various metals and metallic compounds to be released into water. These pollutants also enter the water bodies as acid rain and their sulphate and nitrate ions make water acidic. Most inorganic compounds are toxic, particularly, those of..

>(vi) It is used by the chemical, petroleum, and paint industries to provide inactive atmosphere to prevent fires or explosions. (vii) It is used in the industrial preparation of ammonia, which is converted into ammonium salts, nitric acid, urea, calcium cyanamide fertilizers etc. (viii) ..