Bone China is a kind of porcelain made by adding the ashes of some herbivore into the raw materials of paper burning, so the porcelain after successful paper burning is called bone China, which is slightly more expensive than ordinary ceramics. If the ashes of herbivores can reach 40%, they can be called first-class bone China, which will be expensive, but it is generally not available. Most of the bone China in the world is second-class, but it is not bad.

Therefore, if the inner container of the rice cooker is bone China, no chemical raw materials are added, which is different from purple sand. It's just that the process of burning paper is different I hope I can solve your problem. Welcome to ask questions again. Thank you.