The aluminium hollow glass curtain wall has aluminium in its outermost layer. From the outside, we can see the aluminium covers along with glass. This is why it is called an exposed frame.
Since 1984, Xingfa aluminum profiles has 1200+items of national patents. It led to draw up 64 items of national standards, 25 items of industrial standards. The professional quality meets the international standards of Japanese JIS, American AAMA, ASTM, EU EN, etc.