I. Visual Inspection
Visual inspection is one of the simplest and most commonly used methods for identifying tempered glass. First, check whether the surface of the glass is smooth, whether there are any flaws or cracks, and whether there are any irregularly shaped bubbles. If the above conditions exist on the surface of the glass, it can basically be determined that it is non-tempered glass. In addition, one can observe the edges of the glass with the naked eye to see if there are any signs of damage or cuts, which is also one of the indicators for identifying normal tempered glass.
Ii. Steel Ball Drop Hammer Test
The steel ball drop hammer test is a commonly used method for determining the degree of tempering of glass. According to national standards, at the cut points on the surface of tempered glass with a thickness of less than 6mm, a steel ball with a diameter of 45mm and a weight of 1040g is dropped freely from a height of 1.5m. The hardness and stability of the tempered glass can be identified by the rebound of the steel ball. If the rebound height of the steel ball is less than 90cm or scratches with a diameter exceeding 1.5cm appear on the glass surface, it can be determined that it is non-tempered glass.
Iii. Polarizing Inspection
Polarized light testing is a method for identifying tempered glass based on the principle of polarized light. Stack two polarizing filters and rotate them against each other. If you observe a change in the color of the glass surface, it indicates that the glass is tempered glass and has a relatively high degree of tempering.
Iv. Infrared Spectroscopy
Infrared spectroscopy is a method of measuring the absorption of infrared radiation with a spectrometer and can detect different substances in materials. Tempered glass and non-tempered glass have different infrared spectral characteristics. The results of infrared spectral detection can be used to determine whether the material has undergone tempering treatment.
The above-mentioned several methods are all commonly used identification methods for tempered glass. By combining multiple methods, the quality and performance of tempered glass can be identified more accurately. When purchasing tempered glass, consumers should choose products from regular manufacturers and check the relevant quality certification documents of the products to ensure that they buy high-quality tempered glass products.
