I have kaolin, which is grey. It burns red. Do you need it?
Your kaolin is grey and the burn is red. I guess your kaolin contains more three iron oxide
And mainly hematite. I suggest you increase the whiteness after extracting hematite. After sintering is red kaolin, as ceramic soil, not many people, and the price can not go up, unless someone for the special use of the soil, as the base material is difficult to sell.
