Edible gold foil can be added to wine, cakes, coffee, tea, hot pot, cooking and seasoning, and can also be covered on cold dishes or stir-fried dishes, which can improve the quality of goods, highlight luxury style, increase festive atmosphere and prolong life.
China is the first place to eat gold in history. As early as the Qin and Han Dynasties, the rich in China had records of eating gold foil and powder. In modern times, eating gold foil is also very popular in Japan and Southeast Asia. According to ancient records, eating gold foil can "calm the mind, strengthen the bone marrow, dredge the evil spirits of the five internal organs and serve the gods", "eating gold foil can dispel evil spirits, kill viruses, relieve fever and vexation, soothe the nerves, nourish the heart and enrich the blood" and "eating gold foil can soothe the nerves, beauty beauty and prolong life".
1983, the Codex Committee of Food Additives of the World Health Organization officially listed 9999 natural pure gold in the category of food additives and named it Tabeano. 3 10.
The eighth category of minerals and trace elements, a new food resource issued by the Ministry of Health of China, defines the edible function of gold foil.
In China, Niuhuang Angong Pill, Niuhuang Qingxin Pill, Wuji Baifeng Pill, Dahuoluo Dan and other precious Chinese patent medicines are all made of gold foil. Drinking this kind of products for a long time can play the role of detoxification and beauty. The micro-current generated by gold foil is basically the same as that of human body, so it can promote blood circulation and purify blood through negative ions, and has antibacterial effect, so it is used to treat burns and scalds in medical clinic.
For a long time, due to the rarity and preciousness of gold, edible gold foil was only recognized in a small range, but most consumers did not know it. Modern medical research shows that gold foil can form monovalent compound gold-gold salt after entering human body, which can effectively separate out toxic substances in the body, dredge blood vessels and regulate and improve human immune function, so it has obvious curative effect on hypertension and heart disease.
The edible gold foil we are introducing now is only one tenth of a millimeter thick, which is unknown to most people. As a metal, it is opaque, but the edible gold foil is so thin that it is transparent to light, so even if it is described as "as thin as a cicada's wing", it is actually much thinner than a cicada's wing, and it will break under the tension of water, making it almost impossible to hold it by hand.
With the improvement of people's quality of life, "eating gold" will gradually come into our lives. In addition to the above functions, "luxury" is also a great pleasure that gold brings to our lives.
What does gold foil mean?
What is gold foil?
People's praise of gold often invisibly reflects the special technology of gold, such as "golden branches and jade leaves" and "resplendent and magnificent", which describes an important variety of gold technology-gold foil.
Gold foil is a thin sheet hammered with gold. One or two (365,438+0.25 g) pure gold can be hammered into gold foil with a thickness of one tenth of a millimeter and an area of 65,438+06.2 square meters due to its good ductility and plasticity.
Gold has the characteristics of stable nature, permanent discoloration, oxidation resistance, moisture resistance, corrosion resistance, mildew resistance, insect resistance and radiation resistance. Gold foil made of gold is widely used. In ancient times, the method of making gold foil was to purify gold, then beat it into gold leaves with an area of 2.5 square centimeters with a thousand hammers, then put it into black gold paper smoked with kerosene, and then beat it for 6-8 hours by hand to make the gold leaves into foil, about 40 times the area of the gold leaves, and then cut it into squares. Gold foil is a traditional handicraft of the Chinese nation. It originated in the Eastern Jin Dynasty, matured in the Southern Dynasties and was popular in Song, Qi, Liang and Chen Dynasties. Today, the Longtan area (Jiangning) in Nanjing is the birthplace of gold foil,%
What is gold foil and what is its use?
What is gold foil? People's praise of gold often invisibly reflects the special technology of gold, such as "golden branches and jade leaves" and "resplendent and magnificent", which describes an important variety of gold technology-gold foil. Gold foil is a thin sheet hammered with gold. Because of its good ductility and plasticity, one or two (3 1.25g) pure gold can be hammered into gold foil with a thickness of one ten thousandth of a millimeter and an area of 16.2 square meters. Gold is stable, permanent, anti-oxidation, moisture-proof, anti-corrosion, mildew-proof, insect-proof and radiation-proof. Gold foil made of gold is widely used. In the ancient method, gold foil was first purified and then hammered. Then put it in black paper smoked with kerosene, hammer it for 6-8 hours, make the gold leaf into foil, the area is about 40 times that of the gold leaf, and then cut it into squares. Gold foil is a traditional handicraft of the Chinese nation, which originated in the Eastern Jin Dynasty, matured in the Southern Dynasties and was popular in Song, Qi, Liang and Chen Dynasties. Today, the Longtan area in Nanjing (Jiangning) is the birthplace of gold foil, which has a long history. It is a typical gold foil product. The gold foil made by traditional technology takes gold bars with gold content of 99.99% as the main raw material, and is processed by more than ten processes, such as chemical cleaning, hammering and foil cutting. It is golden in color, bright and soft, as light as a feather, as thin as a cicada's wing, and its thickness is less than 0. 12 micron. Now gold foil production has been integrated into modern technology and used as an auxiliary material. The output and quality have been greatly improved. Modern science and technology carry forward the traditional gold foil technology and develop new varieties of gold foil, such as high-tech laser shallow carving on gold foil with purity of 99%, which has the value of preservation, collection, commemoration and appreciation.
What is gold foil? golden
Gold foil is gold with a gold content of 99.99%.
The gold foil is pure, and the price refers to the price of gold. Gold foil is a thin sheet hammered with gold.
One or two (365,438+0.25 g) pure gold can be hammered into gold foil with a thickness of one tenth of a millimeter and an area of 65,438+06.2 square meters due to its good ductility and plasticity. That is to say, one gram of gold can be made into pure gold foil of about 0.5 square meters with a thickness of 0.12 μ m.
The gold foil made by traditional technology takes gold bars with 99.99% gold content as the main raw material, and after more than ten special processes such as chemical cleaning, hammering and foil cutting, it is golden in color, bright and soft, as light as a feather, as thin as a cicada's wing and less than 0. 12 micron in thickness. The earliest discovery of gold foil was made in the Nile valley of ancient Egypt. In China, gold foil is a traditional handicraft of the Chinese nation. It originated in the Eastern Jin Dynasty, matured in the Southern Dynasties and was popular in Song, Qi, Liang and Chen Dynasties. Nanjing is the birthplace of gold foil in China. It has been circulating for nearly 1700 years, and now Nanjing is the largest gold foil production center in the world.
In May 2006, Nanjing Gold Foil Forging Technology was listed as the first batch of national intangible cultural heritage by the State Council. Extended data:
Generally, we can observe the difference of gold foil with the naked eye. Real gold foil will emit green light, while imitation gold foil will not. Also, real gold foil is much thinner than imitation gold foil, which is easy to break when touched, while imitation gold foil is much thicker than real gold foil and will not break when touched. Also, real gold is not afraid of fire, and it can distinguish between true and false when burned. The main raw material of imitation gold foil is copper. Burning copper oxide will turn black, but real gold will not.
If you want to measure the pure gold content of gold foil, you have to use a special instrument, but it can also be roughly distinguished by human eyes, including 9 red, 8 yellow and 7 blue. That is, those with a gold content of over 90 are light red, those with a gold content of 80 are light yellow, and those with a gold content of 70 are cyan.
Nowadays, the production of gold foil has been integrated into modern science and technology, and the auxiliary materials (such as Wujin paper) and equipment used have been greatly innovated, and the output and quality have been greatly improved. Modern science and technology will carry forward the traditional gold foil technology and develop new varieties of gold foil, such as high-tech laser shallow carving and bronzing on gold foil with purity of 99%, which has the value of preservation, collection, commemoration and appreciation.