Color Picking Requirements For Color Coated Aluminum Coil

Color selection requirements for Color Coated Aluminum Coil : The choice of color is mainly based on the matching with the surrounding environment and the owner's hobby, but from the technical point of view, the choice of pigments for light color coatings is large, and inorganic pigments with superior durability can be selected ( Such as titanium dioxide, etc.), and the thermal reflection ability of the coating is strong (the reflection coefficient is twice that of the dark coating). The temperature of the coating itself in summer is relatively low, which is beneficial to prolong the life of the coating.

In addition, even if the coating is discolored or chalked, the contrast between the light-colored coating and the original color after the change is small, and the effect on the appearance is not large. The dark colors (especially the brighter colors) are mostly organic colors, which are easy to fade when exposed to ultraviolet rays, and will change color in a short period of 3 months. For color-coated steel sheets, the thermal expansion rates of the coating and the steel sheet are usually different, especially the linear expansion coefficients of the metal substrate and the organic coating are quite different. When the ambient temperature changes, the bonding interface between the substrate and the coating will be Expansion or shrinkage stress occurs and cracking of the coating can occur if it is not properly relieved.

One is that there are a large number of white primers in China. The purpose of using a white primer is to reduce the thickness of the topcoat because normal architectural corrosion-resistant primers are yellow-green (hence the strontium chromate pigment) and must have sufficient topcoat thickness. The second is the color-coated steel plate used in construction projects. The same project uses color-coated steel plates from different manufacturers and different batches. It seems that the color is the same during construction, but after several years of sunlight exposure, the color trends of different coatings and different manufacturers change. Different, resulting in serious chromatic aberration, there are too many such examples. Even if the products are from the same supplier, it is strongly recommended to place an order for the same project, because different batch numbers may use products from different paint suppliers, which increases the possibility of chromatic aberration.