When the whole shape of the statue had been modeled, the clay inside the core is scraped out from a hole which was cut in an inconspicuous place such as on the back of the statue; then wooden framework is placed inside the statue for reinforcement and to prevent warpage.
なお、像の形が完成した後は、背面などの目立たない部分を切開して中味の塑土を掻き出し、補強と型崩れ防止のために内部に木枠を組む。