Several points to review the appearance of aluminum profiles
First of all, of course, is to look at whether the appearance of aluminum profiles have obvious distortion, touch the surface is smooth and smooth, there are no cracks or bubbles, scratches, burrs and other unsmooth places. If it is found, it is best not to purchase it. This is the most obvious point of quality problems.
Secondly, it is necessary to carefully check the surface color of aluminum profiles for the presence of color differences. A color difference means that the quality is not closed. Or you can put the same type of profiles together for comparison. If the color difference is too obvious, it is best not to purchase. In addition, check whether the profile thickness of the aluminum profile is the same as that of the marked model, and whether there are any physical objects and labels.
Finally, you can use a smooth hard object to scratch the surface of the aluminum profile, leaving a white scratch. We gently wipe and observe by hand. If it cannot be wiped off, it indicates that the material may have quality problems. If it can be wiped off easily, it means that the thickness of the oxide film on the surface of the profile is acceptable.
