Yunzi is produced by Yunnan Weiqi Factory, a state-owned enterprise in Kunming. The main raw material is quartz sand (the most important raw material for making glass), which belongs to sporting goods.
In addition, make an objective comparison between Ge Qishi and Yong Zi.
Raw materials: Clam stone is a natural shell that can proliferate-the shell of clam and Na Zhi Blackstone (mainly used to make inkstone, you can buy one side for a few hundred dollars);
Yongzi uses non-renewable jadeite, south agate, amber, Huanglong jade and other precious stones (involving patent secrets, only a few can be publicized), and the raw materials are even scarcer, and the proportion of black and white is symmetrical.
Technology: Clam stone is polished by hand, because it is exquisite and expensive;
The raw materials of Yongzi are all melted by thousands of degrees and then hand-dripped. There is no model grinding tool when dripping. The size, thickness and roundness of each chess piece are mastered by craftsmen. It takes 1.825 days for craftsmen to drop the entry-level word, and the formula handed down from generation to generation can be completed in an instant!
History: Jigsaw Stone was invented by Hidjiro of Nana Ogawa in 1908;
The word Yong was invented by Li Dezhang in 15 12 and became a tribute in 1539. It has been 507 years since the invention of the word Yong, of which more than 300 years have been the tribute of the imperial court. Today, our 12 generations of inheritors are still using the skills and formulas of the Ming Dynasty, and the annual output is extremely limited. Art is unique and more inherited.
Inheritance: Clam stone is a natural shell, and no clam stone can be preserved for hundreds of years.
Yongzi in the Ming Dynasty has been more than 500 years old and will not decay for thousands of years. After many vicissitudes, its style remains the same.
Quality: Clam stone yellow, fragile, reflective, visual fatigue caused by playing chess for a long time.
Yongzi's color is soft and not dazzling. Black as crow green, white as egg white. Sunspots glow at the edge of light, while albinos are crystal clear at the edge of light. Rock double-sided convex Go and rock chess are non-corrosive, lead-free and radioactive. Their Mohs hardness is the same as that of jadeite, but their toughness is higher and they can't be broken by hand.