In the national standard for the thickness of aluminum veneer, the lower difference in the thickness of the plate is not strictly regulated. However, in the industry specifications of the aluminum curtain wall industry, the general default substrate thickness can be allowed to differ by 0.15mm, such as 2.5mm aluminum veneer, the thickness of the blank is 2.35mm, plus the thickness of baking paint, about 2.40~2.45mm thickness, in line with national standards.
Reference national standard: GB/T 23443-2009 aluminum veneer for building decoration
JG/T 331-2011 Fluorocarbon aluminum veneer products for building curtain walls (implemented on February 1, 2012)
YS/T 429.2-2000 aluminum curtain wall panel, fluorocarbon painted aluminum veneer
