For a drumhead, the split leather must be thin and even. Only then will the tone of the drum be true. But the edge of the drumhead, where twine will be attached to pull it taught, must be thicker if it is to be strong enough to withstand the stretching process.
削皮時，鼓面要薄，刀法要勻稱，音質才會準確；至於鼓面邊緣四周與繩索結合的地方要厚，才禁得起「繃鼓」