The clay used to make zisha pottery is made of clay in the middle belt sand. Flexible and strong, strong plasticity, rich color characteristics. Common mud materials are purple (actually deep ochre or brown) sand mud, milky white mud, orange yellow mud, scarlet red mud, blue green mud, etc., known as “five colors of earth” (actually is a variety of colors of ore). Clay crushing well is blended into mud and made into utensils. After sintering by kiln fire, the surface of the ware is smooth and smooth, containing small particles, showing the unique simplicity and moist sand. Among them, there are many utensils made of purple mud, so it is called purple sand pottery or purple sand ware.
In fact, there are many kinds of raw materials for making billets, mainly regular mud (ancient known as green mud), Benshan green mud (also known as Tuanshan mud), red mud (also known as red mud, stone yellow) three kinds.
Purple clay: It is the most commonly used raw material for making purple sand pottery. Purple sand mud is hidden in the nail mud (also known as mud). Nail mud is a kind of hard mudstone, silty clay, without weathering called stone bone, a hard block, like “iron armor”, hence the name “nail mud”, also called “clamp mud”. The purple mud is hidden in the nail mud, so the purple mud has “rock in rock”. “Mud in mud”.
In addition, there are many kinds of pottery mud belonging to the purple mud: pear peel mud, frozen pear color light red mud after winding, loose color after burning: light yellow mud, green after burning: dense mouth mud, light ochre after burning, and so on.
Benshan green mud: also buried in nail mud, or another main variety of purple mud. Its mineral Saturn egg blue, smooth surface like kitchen. More precisely, Benshan green mud is sandwiched between the yellow SLATE and the Jiamud, also known as the Jiazhi, and the purple mud in the same mineral layer, is the layered Jiazhi between the mud and the purple mud. It is light yellow after sintering.
Red clay: It is also the main raw material for making purple clay pottery. The ore is orange yellow, buried in the bottom of the mud mine, solid as stone, also known as “stone yellow mud”. The yield of red mud is small, and the color is different. It needs to be selected from raw ore. High-quality red mud raw ore with consistent color should be mined and preserved separately to ensure the purity of the mud. After firing, due to the amount of iron content, it presents cinnabar, cinnabar purple, crabapple red and other colors. Due to the small output, in addition to the use of red clay to break the “horizontal pot” sold to Southeast Asia in the past, it is generally only used as makeup soil, and red clay POTS or POTS can be burned.
In addition, there are green wet (also known as wet) red wet black black wet white wet wet, deep disease under the dry rock charcoal, mixed in the wet, can make purple clay pot, but these mud production is very small, mud tender, refractoriness is lower than purple mud, so it must be fired separately, or as ingredients.
