How to identify enamel color

One of the benefits (advantages) of studying tiles is to be able to observe the ancient porcelain fetus very realistically. All the information of the tire can be seen in the section of the scrap, including the thickness of the tire, the color, the pore state, the particle state, the purity of the fetal material, the impurity status, the water absorption performance, the hardness, etc. Different times or different kiln mouths have obvious or subtle differences. This is an important perspective for porcelain identification. This information is difficult to fully disclose the entire device. The entire device is basically covered with glaze, and the "tip of the iceberg" is exposed only at the bottom contact surface (outer end, foot end) and the glazed shrinkage glaze, and these limited "exposed tires" are often not disclosed True information, and often “artifacts”—often made of ceramic (appearance clay), oxide (flint red), acid-base corrosion, mildew stains, dirt deposits, etc., are not true fetal colors. These people who used to appreciate porcelain in the past as "artifacts" (including some old-fashioned antiques) were identified as fetal color (fetal images) and were mistaken in writing books. Gein has never studied porcelain tiles, but he has only used "bottom feet" to study the fetal color of a certain kiln. (They often pay attention to official kilnware or treasures, how can they take down one point to observe the real porcelain tires, but they do not bother to destroy ancient porcelain in large numbers in the people's kiln, and they do not enter their horizons) so the information they obtain about the so-called ancient porcelain tires is both Less but not true. This kind of erroneous ancient art used to treat artifacts as porcelain fetuses, such as the enamel fetus is said to be "copper bone."

In fact, "copper bone" is the oxidation phenomenon of the enamel's fetus. It does exist, and it is common, but it is not a true fetal color. Predecessors of true fetal color have also said that they are "incense ash fetus." But what is "incense gray tire"? You'd better not go to the censer to find the evidence, because the ancient "incense ash" is different from the modern "incense ash". You'd better observe the enamel tiles directly, and then you will understand what the ancients say is "incense ash." fetal".

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Classification of porcelain raw materials

Although there are many raw materials for making porcelain, they can be summed up into three categories: the first category is plastic raw materials; the second category is non-plastic raw materials; the third category is molten raw materials.

Plasticity refers to the nature of a phenomenon that changes its shape after being subjected to an external force. After the above effect is stopped, the shape can be maintained while changing its shape without causing cracking. The raw materials for making porcelain are called plastic raw materials with such properties, and the lack of such properties is called non-plastic raw materials (or viscosity-reducing raw materials). Melting aids called melting raw materials can be used during the firing process.

There are various types of plastic clay (including kaolin and china clay, etc.) that are plastic raw materials; quartz, feldspar, pegmatite, and other calcined raw materials (powdered) and broken tiles belonging to non-plastic raw materials. It also includes hard clay. The main raw materials for melting are talc, dolomite (anthranite), and limestone (gray stone). However, feldspar can also be used as a raw material for melting.