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How to distinguish between genuine and fake steel doors and windows, mainly in the following four aspects:
(a) Profile color. The color of the real steel section is blue-white; the color of the false steel section is yellow in white.
(b) Whether or not there is a steel lining. There is a steel lining inside the real steel section; there is no steel lining inside the false steel section. The presence or absence of steel lining is very intuitive from the perspective of the cut surface and cannot be seen from the outside. The way to distinguish is: Take a magnet and suck it against the profile.
(c) Protective film. True plastic steel protective film is hot, there will be no small bubbles; false sea plastic is manually posted, there will generally be small bubbles.
(d) security labels. Real plastic steel anti-counterfeit label is very clear, wipe with water can not afford to fade; fake steel anti-counterfeit labels are fuzzy black, water wipe will fade, and some will even disappear.
The upper left profile is a genuine conch profile, and the bottom right with three fingers can easily be deformed by the inferior profile. According to national industry standards, the profile section thickness must be 2.2mm. The cross-section thickness of the real profile Shide is 2.2mm, the profile thickness of the real conch is 2.5mm, and the thickness of the counterfeit profile is only 1.2. Please be sure to look carefully and clearly when buying.
Building materials, doors and windows
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