"Using red glaze poses major difficulties, because depending on various factors-such as the thickness of the glaze, the temperature at which it was glazed, and the atmosphere-it's easy to for the red not to come out, or for the surface to grow cloudy, or for the color to become darkened."
「釉裡紅呈色燒成難度極高，因為隨著銅紅料的濃度、燒窯溫度、氣氛與時間上的種種變化，銅極易揮發而使紅彩不能顯現，或釉面發濛，或彩色發暗。」