After iron removal and bleaching, the iron content in cornish stone had been dropped from 0.64% to 0.20% and the cornish stone whiteness had been increased from 68.2% to 83.7%. The highest whiteness could be 84%. ?

• 经除铁漂白处理；使瓷石中铁的质量分数由原来的0.；64%25降为0