Donkeys originated in Africa and West Asia, and later spread to Mongolia and Xinjiang. Zhang Qian introduced the donkey to the Central Plains when he went to the fortress. Later, it was widely raised by farmers and became one of the most important livestock in the Central Plains, alongside cattle, horses, pigs and sheep. From the Five Dynasties to the Song Dynasty, cowhide was forbidden. In ancient times, military materials were widely used for civilian use, especially for making soldiers' armor, shields, harness for chariots and horses and glue for making crossbows. In ancient agricultural society, cattle farming was an extremely important production tool, which could not be slaughtered casually, but only dead cowhide. It is for the above reasons that Ejiao was widely used in the Tang Dynasty. Niu Pijiao in Song Dynasty was made of inferior cowhide abandoned by the government, so doctors thought it was not suitable for medicine.
Why is the price difference of Ejiao on the market so big?
A good donkey-hide gelatin needs to be boiled with whole skin. As early as 1996 and 2002, CCTV repeatedly exposed the incident that a pharmaceutical factory used horse skin as donkey skin to produce Ejiao. CCTV 20 10 survey found that many Ejiao originally came from horse skin or even inferior leather. Raw hides basically cut off the heads, skins, legs and feet discarded during leather processing, which is also commonly known as scraps. 20 12 "Fake Door", a semi-finished donkey-hide gelatin block produced by a pharmaceutical factory with the help of a factory in Xinjiang is suspected of fictitious origin, and the industry data used to support the price increase is also suspected of fraud. Only a good donkey can produce good skin. Standard: the breeding cycle of donkeys needs 3-5 years, and donkey skins under 3 years old are not needed; Don't use chemically contaminated donkey skin; Donkey skin with skin diseases is not needed. 3kg donkey hide can be boiled 1kg donkey hide, and only 3 boxes of donkey hide can be boiled. The production cycle of a box of donkey hide takes 50 days.
3. What's the difference between colla corii asini, tortoise plastron, colla cornus Cervi, carapax Trionycis and colla corii asini?
Colla Corii Asini, Carapax et Plastrum Testudinis, Colla cornus Cervi, Colla Trionycis and gelatin have different functions, so they should be selected according to different needs.
Compared with antler glue, donkey-hide gelatin is more suitable for nourishing yin and blood, while the latter is more suitable for men.
Both turtle shell and tortoise shell have the effects of nourishing yin and clearing heat, which is suitable for people who are prone to get angry, which is not available in donkey-hide gelatin and antler glue.
Carapax Trionycis glue also has the function of promoting blood circulation, and has the special function of breaking blood stasis and resolving hard mass.
Carapax Trionycis glue can strengthen bones and muscles, and osteoporosis can be given priority.
Ejiao has all the functions of yellow gelatin, but its efficacy is different. Generally speaking, Ejiao has a better blood-enriching effect than yellow gelatin, but the advantage of yellow gelatin lies in stopping bleeding and nourishing blood, moistening intestines and relaxing bowels.
4. Why is tribute glue expensive?
As the name implies, "Golden Success Gum" is a top-grade donkey-hide gelatin specially used to pay tribute to the imperial court. "There are dragons and phoenixes in people, and the best in glue", and the best in Ejiao is "tribute glue". Chenggong glue, also known as Jiugong glue or Jiutian tribute glue. Jincheng Gongjiao, as a royal tribute, was first seen in Zhu's "one-year-old tasting boiled glue to pay tribute to Tianfu" and has been a royal tribute since the Northern Wei Dynasty. Chenggong rubber is made of healthy pure-bred black donkeys aged 3-4 years, and the skin is peeled and dried in the winter to one month before. The winter solstice is when the cathode is sunny, and the water in Dong 'e is the most turbid water in the world. When it is cloudy, choose cloudy water and use black donkey skin to refine glue. The secret making process lasted 2500 years, with cauldron, silver shovel and Sang Mu as fire, and was refined through 99 processes. The tribute glue is delicate, the color is like bright paint, and the light is like amber. Face as flat as a mirror, but not soft after summer.
Reveal three precious secrets of tribute glue;
1, choose the best time to get water at midnight from winter solstice.
The saints in Huangdi Neijing nourish yang in spring and summer and yin in autumn and winter. The cathode is positive in winter solstice, and the groundwater in Dong 'a is heaviest in winter solstice. In Song Dynasty, Shen Kuo once said in Meng Qian's Bi Tan: A water mirror has a downward trend, which is clear and heavy. "Take its boiled glue and call it Ejiao"; Li Shizhen's Compendium of Materia Medica said: "Water is injected into the well, and the well is boiled with glue. The turbid water will be clear, and people will take it, and the lower diaphragm will eliminate phlegm and stop vomiting. Its water is clear and heavy, and its sexual tendency is downward, so it is turbid and turbid.
2. Choose the best raw materials. The rare monkshood donkey is an essential raw material for making tribute gum, but now it is on the verge of extinction. Chen Xiuyuan: "If you must use black leather, it will help you nourish your heart. Black belongs to the kidney, which means that fire and water will help you. " . The ancients believed that black water entered the kidney meridian, and black donkey skin entered the kidney, which could replenish the innate foundation. Black donkey skins collected from winter to Sunday have the heaviest yin content, thick and bright skin, rich nutrition and storage, and the best effect of nourishing yin by rubber refining. In this way, when choosing Yin, the water of Yin and the donkey skin of Yin blend with fire, and the refined tribute gum reaches the balance of Yin and Yang, which is the most nourishing.
3. Follow the ancient techniques and 99 traditional techniques.
The refining process of Chenggong gum is very elegant. It needs 99 traditional processes, such as skin washing, skin soaking, cold skin cooling, shaving, peeling and rubber refining, and it takes more than 100 days to make it by hand. As long as one link goes wrong, the whole pot of tribute glue will be scrapped (for example, if the foam is not good, the pot will stick). Therefore, it is very rare to get into the glue.