On mirrors, in addition to the appearance of new shapes, reverse side buttons began to take on animal shapes and obverse surfaces became convex.
鏡鈕在此時多作獸形，質地厚重，鏡面則凸起略成弧狀，顯示唐人對凸面物理作用的深切瞭解。此外，由於合金中銀錫的成份增加，故銅鏡表面多呈銀白色，更加光亮。