Automotive glass is also very important to us. It is related to sound insulation, heat insulation and collision safety. In fact, there is a small logo in every corner of the glass, from which we can read the manufacturer, type and certification of the glass. The content of our today is just related to it. Yes, glass will not play a decisive role in the selection of cars, most of the situation may be ignored, but the purpose of the article today is to lead people to understand the data, and to be careful when choosing a car and replacing the car glass. Let's take a look at a few famous manufacturers of car glass: SAINT-GOBAIN, the more famous car glass manufacturer, has a very high proportion of assembly in the car, especially the local brand of France. Saint-Gobain, founded in 1665 by Mr. Colbert, is the world leading group in the design, production and marketing of practical materials worldwide. Materials for production and sale include automotive and building glass, glass bottles, piping systems, mortar, gypsum, refractory ceramics and crystals. The group consists of five major businesses: flat glass, glass packaging, building products, building materials distribution and high functional materials. In recent years, many joint ventures have been using cheaper glass solutions to reduce costs, and domestic FY has become the preferred choice for many manufacturers. Fuyao Group, established in 1987 in Fuzhou, China, is a Sino foreign joint venture specializing in the production of automotive safety glass and industrial glass. It is also a large multinational industrial group. It is the most large-scale, most technical and most exported car glass production supplier in China. Of course, Fuyao is not meant to mean the low end. The Volvo S80, known as the safest car, has chosen the double glazing produced by Fuyao and has a good performance in safety and sound insulation. The glass of AGC group in Japan often appears on the signs of automotive glass. AGC has 13 float glass lines in Japan, whose parent company is the MITSUBISHI group and has its subsidiaries in China, Thailand, Indonesia and Belgium. The glass certification, like other products, should be certified when the car glass is out of the factory, and the information, including the manufacturer, is integrated in the corner of the glass. The automobile glass should have national safety certification marks, which is also the most important. Other common certification marks are the "DOT" of the United States and the "E" authentication of European ECE, which means that the product has passed the corresponding certification permission and can be exported to foreign countries. Since October 2002, EU E certification, according to the EU directive 72/245/EEC, and the requirements of the revised directive 95/54/EC, all automotive electronic and electrical products that enter the EU market must be certified through the e- Mark related test and labeled with the e logo, and the customs of the European Union will be allowed to release and permit access to the local market. Therefore, e-Mark certification for automotive electronic and electrical products is imperative. The E logo is derived from the regulations promulgated by the EconomicCommisssion of Europe (ECE) (Regulation). At present, ECE includes 28 European countries, with the exception of EU members, including Eastern Europe, southern Europe and other non European countries. ECE regulations are recommended for members, not mandatory. Member states may apply ECE laws or regulations. At present, from the perspective of market demand, ECE members are usually willing to accept test reports and certificates that conform to ECE regulations. The products of the E logo certificate are parts and parts of the system, and there are no corresponding regulations for vehicle certification. Products that have obtained E logo certification are accepted by the market. The common E certification products in China are automobile bulbs, safety glass, tires, triangle warning signs, electronic products for vehicles, etc. The executing agencies of E logo authentication are generally the technical service organizations of ECE member countries. The certificate issuing agency of the E logo is the certificate issued by the government departments of the ECE member countries with corresponding numbers: E1 Germany; E2 - France; E3 Italy; E4 - Holland; E5 Sweden; E6 - Belgium; E7 Hungary; E8 - Czech; E9 Spanish; E10 - Yugoslavia; Britain; Austria Austria; Lu Sen. Fort; E14 - Switzerland; E16 - Norway; E17 - Finland; E18 - Denmark; E19 - Romania; E20 - Poland; E21 Portuguese; E22 Russia; E23 Greece; E25 - Croatia; E26 Slovenia; E27 - Belarus; Estonia; Slovakia - Bosnia and Herzegovina; Turkey Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey; Turkey OT certification of the United States Department of transport (DOT) clearly stipulates that any conformance application to the federal motor vehicle safety standard (FMVSS) proposed to DOT must be based on the manufacturer's understanding of the OVSC (vehicle safety in office) laboratory testing procedure and production as the DOT product safety specification. In other words, DOT specifies the laboratory testing procedures, laboratory testing equipment, test tolerances, product standards requirements, specific testing steps, and testing reports requirements for each specification of motor vehicles and parts and components. All manufacturers who export motor vehicles and parts products to the United States must ensure that their products meet the laboratory testing procedures required by DOT. * the above part of the information comes from Baidu * below. We will explain the meaning of these codes with examples. This is the last time to come to the editor's Lifan X60 glass, we can see a big sail sign, which is authorized by the power sail to make the glass factory, CCC is China's 3C compulsory certification, and a string of numbers under 3C represent the manufacturer of glass, E000472 is Saint Gobain Glass world goatt glass (Shanghai). Limited company, TEMPERED represents this glass is tempered glass. E4 is Europe's ECE certification. 4 means the certification body is Holland. DOT indicates that the glass has passed the approval of the US Department of transportation, and 772 represents Saint Gobain (Shanghai) Limited. You can also see the word "AS2" behind DOT, which represents a glass with a light transmission rate of less than 70%. The available range is "for any part except the front windshield", and the light transmittance of this glass is not less than 70%, that is, "clear glass" is "used in front windshield", and you can turn back to verify yourself. That's the way the car is. 43R-000071:43R is a specific number for the EU's toughened glass Standard No. 000071. "..1" means production date, 1 is on behalf of 2011 production, the black dot is produced in the first half of the year before the number, and the "7- black point" can draw the month for the production of glass for May 2011. If the black point is in the number, the glass is produced for the second half of the year, the calculation formula of the specific month is "13- black point number". This formula can be used to determine the production date of automobile glass, which will help to buy used cars. The same as the previous model, DOT772 and E000472 both indicate that this is from Saint Gobain Glass world solid ruiet glass (Shanghai) Co., and why is it HanGlas? This is because the joint venture between the Saint Gobain group and the HanGlas group of Korea has 50% shares. The rest of the logo is basically the same as the Lifan X60, all of the toughened glass used for side windows, and TRANPARENCIA 70% represents a minimum transmittance of 70% for the glass, and has a certain heat insulation capability. I just take the above two cars as an example. In fact, no matter which brand of glass, the number is basically based on the code above, although everyone will not choose or give up a car for a glass model, but understanding the number of glass can be very good when buying a second-hand car or replacing the glass. It is possible to avoid the fact that the merchants who are not virtuous will install the glass which does not conform to the specifications to their own car, which will cause a hidden danger to the safety.