Why is it said that tempered glass has high appearance quality

Source：www.cnxingfu.net Release date： 2025-06-04

Information summary：The reason why tempered glass is considered to have high appearance quality is mainly due to the special production process and strict quality control standards. Analyze its appearance advantages from multiple dimensions as follows: 1、 Surface flatness and smoothness 1. Precise tempering process During the tempering process, the glass needs to undergo high-temperature melting (620-650 ℃)

The reason why tempered glass is considered to have high appearance quality is mainly due to the special production process and strict quality control standards. Analyze its appearance advantages from multiple dimensions as follows:
1、 Surface flatness and smoothness
1. Precise tempering process
During the tempering process, the glass needs to undergo high-temperature melting (620-650 ℃) and rapid cooling (wind pressure or liquid medium), which is achieved through a roller conveyor system.
Key control: The surface of the roller conveyor is polished and the transmission speed is uniform (error ≤ 0.5%), ensuring that the glass is subjected to consistent force during heating and cooling, and avoiding surface defects such as wave patterns and roll marks that are common in traditional annealed glass.
2. Excellent optical performance
The visible light transmittance of excellent tempered glass can reach over 88% (ordinary glass is about 85%), and the curvature is ≤ 0.2% (flat tempered glass). There is no obvious deformation when viewed from the side, and the visual effect is close to a "completely transparent plane", suitable for scenes such as building curtain walls and furniture mirrors.
2、 Refinement of edge processing
1. Multi stage edging process
Before tempering, the edges of the glass need to be subjected to three levels of rough grinding, fine grinding, and polishing:
Rough grinding to remove cutting burrs and form a preliminary chamfer (usually 45 °);
Fine grinding ensures that the edge roughness Ra is ≤ 1.6 μ m and the tactile sensation is smooth;
After polishing, the edge presents a mirror effect, reflecting light evenly without scattering, enhancing the overall texture.
2. Rounding treatment is optional
For scenarios with high safety requirements such as furniture and home appliance panels, the edges can be further processed into R-angles (radius ≥ 2mm), which not only reduces the risk of collision, but also enhances aesthetics through curved reflection (such as the "2.5D curved edge" design of mobile phone tempered film).
3、 Impurities and defect control
1. Strict screening of original film quality
Tempered glass should be made of ultra white glass raw sheets (iron content ≤ 0.015%) or high transparency float glass. Before production, defects such as bubbles (diameter>1mm ≤ 1/m ²) and inclusions (length>0.5mm ≤ 3/m ²) should be removed through laser scanning detection.
2. Secondary purification during the tempering process
The interior of the heating furnace is protected by inert gas (such as nitrogen) to prevent the glass surface from reacting with oxygen at high temperatures and producing "white mist"; The cooling section is equipped with high-efficiency filters (with a filtration accuracy of ≥ 0.3 μ m) to prevent dust from adhering to the glass surface in the air.
4、 Color uniformity and decorative value
1. Good coloring process
If colored tempered glass is required, it can be achieved through coating (such as magnetron sputtering) or interlayer glaze technology:
The color deviation of the coating is Δ E ≤ 1.5 (difficult to distinguish differences with the naked eye), and the adhesion of the film layer is tested by the cross grid method (hundred grid method) (detachment rate ≤ 5%);
Color glazed tempered glass adopts screen printing+high-temperature sintering process, with glaze particle size ≤ 50 μ m, clear and color free pattern edges, suitable for customized decoration of building curtain walls (such as gradual color change, geometric patterns).
2. Rich interlayer effect
When multi-layer tempered glass is laminated (such as PVB/SGP film), the thickness deviation of each piece of glass is ≤ 0.1mm, and the overall flatness error after superposition is ≤ 0.3mm/m, so as to avoid "rainbow lines" or visual ghosting, and improve the transparency of doors, windows, and glass walkway.

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