燕下都半瓦当均为范具压制当面纹饰。范具呈圆形,由两个相同且对称的图案构成,两图案中间留有一条较窄的切割线(图一)。制作时,将范具在当面泥坯上压制纹样,然后粘接于筒瓦坯的母口一端,再沿切割线由外向内切割,将其一分为二,最后 Swallows are half a tile as a template to suppress the surface decoration. The mold is circular and consists of two identical and symmetrical patterns, with a narrower cutting line in the middle of the two patterns (Figure 1). During production, the mold is pressed on the surface of the clay blank pattern, and then bonded to the blank holder one end of the tile, and then cut along the cutting line from the outside to the inside, will be divided into two, and finally