Li explains that raising the temperature too fast would crack the plaster cast, while lowering the temperature too fast would cause internal cracking in the crystal. "I set the kiln to automatic temperature control to ensure the proper temperature curve. After it reaches peak temperature, I let the temperature gradually drop by about five or 10 degrees per hour."
李財旺解釋，升溫太快，石膏模會龜裂；降溫太快，琉璃白菜的芯蕊則會內裂，所以「將電窯設定自動控溫，畫出溫度曲線，待溫度緩慢升至頂點之後，再以每小時 5 ∼ 10 度的緩速降溫。」