Also called kamazume. A type of pottery made by Yaki-Usaya, which is made in a kiseru-warabuki-kiln under a kiln. Items that are not suitable for direct contact with the fire are stacked on top of each other and packed in the kiln. In order to avoid deformation of the ware, it should be placed on shelves or weighed on a scale. Ceramics, with the exception of coarse pieces, should generally be avoided contact with the fire, and a saggars or muffle kiln should be used for this purpose. In wood-fired climbing kilns, saggars are stacked in the area where the fire is blown and shelves are placed at the rear. The ashes from the wood adhere to the product but do not melt and contaminate it. When coal is used as fuel, however, the mineral ash adheres to the wood and causes stains.
Therefore, the packing method varies depending on the fuel, the nature of the substrate, and the purpose of the firing. Once the kiln is packed, blocks made of refractory clay are piled up at the entrance and exit, and then the blocks are coated with refractory clay. If a gap is created in front of the door during firing, it is extremely dangerous, and air is sucked in, preventing the fire rate from rising.
