The best way, Li found, is to add powder from pre-fired clay before the clay piece is fired. The more powder is added, the more porous the ceramic becomes upon firing. The other important point is to keep the firing temperature at around 1200 oC, which also increases porosity.
在土中多加「熟料」（加熱過的土粉）是最好的方法，熟料愈多透氣性愈高，再將燒成溫度設定在攝氏一千兩百度左右，可以產生更多的透氣孔，更利於與漆結合。