A coating is a continuous film that is applied to the surface of the object being protected or decorated and can be firmly adhered to the object being coated. It is usually a viscous liquid prepared from resin, or oil, or emulsion, with or without the addition of pigments and fillers, with the addition of corresponding additives, and with organic solvents or water.

Coatings generally consist of four basic components: film-forming substances (resins, emulsions), pigments (including body pigments), solvents and additives (auxiliaries). The film-forming substances are the main components of the coating film and include oils and fats, processed oil and fat products, cellulose derivatives, natural resins, synthetic resins and synthetic emulsions. Film-forming substances are the main components of a coating film and include oils and fats, processed oils and fats products, cellulose derivatives, natural resins, synthetic resins and synthetic emulsions. Pigments are generally divided into two types: colouring pigments, such as titanium dioxide and chrome yellow, and body pigments, which are often referred to as fillers, such as calcium carbonate and talcum powder. Solvents include hydrocarbons. Solvents (mineral spirits, paraffin, petrol, benzene, toluene, xylene, etc.), alcohols, ethers, ketones and esters. The main role of solvents and water is to disperse the film-forming base material to form a viscous liquid. It helps in construction and improves certain properties of the coating film.

The global trend in the coatings industry is towards the reduction of volatile organic compounds and other aspects. The share of traditional solvent-based coatings in China is beginning to decrease, in addition, the development of water-based coatings is beginning to accelerate and is gradually becoming a highly promising coating product. Improving the quality and developing new varieties of water-based coatings is an important part of consolidating and developing water-based coatings.

NOA has nearly 30,000m² central laboratory with organic laboratory, inorganic laboratory, physical and chemical laboratory, thermal analysis laboratory, mechanics laboratory, reliability laboratory, combustion laboratory, weathering laboratory, which can provide one-stop analysis and testing services such as raw material quality control, composition analysis, foreign substance analysis, performance testing and reliability testing for plastic materials and products.