21 May, 2024
Observe the color and appearance: Good UPVC profiles are uniform in color, usually white with bluish tint, rather than yellow. At the same time, the surface should be smooth and free of defects such as bubbles, cracks, scratches, and impurities.
Measure wall thickness: If conditions permit, you can use a vernier caliper to measure the wall thickness of the profile. The wall thickness of good UPVC profiles usually meets national standards and is evenly distributed.
Check the hardness: Good UPVC profiles have high hardness and are not easily deformed. You can initially judge its hardness by pinching it.
Listen to the sound: Drop the UPVC profile on the ground. The sound of good profiles is usually dull, while the sound of inferior profiles is crisp.
Observe the combustion situation: Good UPVC profiles are made of high-quality raw materials and will not emit black smoke or smell when burning.
Pay attention to brands and manufacturers: Choose UPVC profiles produced by well-known brands and regular manufacturers, usually with better quality assurance.
In addition, you can also observe the cross-section of the UPVC profile to see whether it has a compact structure, whether the pores are uniform, and whether there are impurities, etc. At the same time, you can also pay attention to the hardware accessories of UPVC profiles. High-quality plastic steel doors and windows usually use metal hardware with high strength, while plastic hardware may be a sign of inferior plastic steel doors and windows.