How to identify tiantie

Like dzi beads, Tiantie imitates more and more people as they like them. The current identification methods can generally be divided into:

1. Material: meteorite or thunder iron. When identifying iron, we can identify it according to its color. For similar meteorite specimens and ordinary meteorites, both contain nickel. If the nickel content exceeds 10%, or the density is high and the rust phenomenon is low, we will ask questions. Copper can be verified according to the alloy proportion of Buddha statues in different ages, which is a traditional casting method. Copper is mainly made of copper, copper, bronze, brass and white copper. The copper content of red copper and red copper is the highest, generally above 90%. Due to the difference of surface oxidation degree and trace elements, it will be reddish or purple. Blue copper belongs to copper-tin alloy and contains a small amount of lead. Its color is deep red, and it appears reddish or aquared, cyan and yellow according to the alloy proportion. Brass refers to copper-zinc alloy, which is golden in color. The higher the zinc content, the lighter the color. White copper refers to a copper-nickel alloy containing a small amount of zinc, which is grayish white and silvery white. However, a few copper tiantie made after17th century will use air milling copper similar to Xuande furnace, which is made of six to eight metals after 12 smelting. Generally, the surface is bright and hardly rusts. The color, specific gravity, fine density and hardness of different ages will also be different due to different smelting methods and processes, which is also the key point that can not be ignored in the identification process.

Second, the shape: the shape of Tiantie mainly comes from religious and cultural patterns, mostly the epitome of the shape of Buddha. Tiantie is generally not gold-plated or covered with gold, and its shape is simple. In terms of process requirements, it is not lower than that of Buddha. Even if it is cast with a mold, there will still be manual nicks. Generally, the five senses will be made, and the external meticulous decoration will be made by hand, and some are like spells.

Third, rust: iron is mainly red iron oxide, and there is little rust on the iron in God. If there is rust, it will generally pile up, that is, it will turn black after gasification and reduction. Therefore, many iron ores in Tian Tian are black. Most people think that red iron oxide will appear when there is no rust to scrape off the surface, and the internal rust is deep, which will gradually peel off and wear over a long time. At present, the well-preserved tiantie is still very practical to wear at ordinary times. In the process of human use, it slows down the speed of natural oxidation, greatly increases the density of appearance, and reduces the invasion of water and oxygen, but this has little effect on rusty tiantie. On copper rust, copper oxide and copper sulfide are black, cuprous oxide is red (erythema or red rust), copper sulfate and copper hydroxide are blue (sky blue spots), and common green rust is copper oxide and copper dioxide. At the same time, the content of elements other than copper in alloy copper will affect its oxidation degree and rust color. Wear and tear: In fact, tiantie, which is usually worn for a long time or passed down from generation to generation, has almost no corrosion even after thousands of years, but has more or less wear and tear. Generally speaking, people usually judge by the holes they wear, but in fact it depends on the integrity. Generally, the protruding parts wear out first. If it is not worn with rope, but wrapped or put in a shack, there will be no obvious wear and tear in the hole, so it should be comprehensively identified when judging. The identification of Tiantie has gradually become more and more complicated, which is mainly due to the fact that after the hype, a large number of molds have been cast, and the old method of quoting forged ancient money has become increasingly sophisticated. Some high imitation works also use the proportion of bronze and brass before, or some residual parts have been melted and recast. In the traditional identification of Yilai red, blue rust, sound, trachoma and stomata, especially the smell, we should also understand the latest old-fashioned methods

I hope the answer can help you.