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X-ray archaeological spectrometers for antique collections

Yunnan ancient ceramic scientific testing laboratory entered zhuhai for the first time.The energy dispersionx fluorescence spectrometer can identify the age and area of the constituent materials of ceramic clay, color and glaze.

Early in the morning, guo began to toss his antique treasures.Under the scorching sun, those big blue and white POTS, pastel bottles, longquan celadon were laid out all over the floor.Shen huayou, director of the ancient ceramics scientific testing laboratory of yunnan collectors association, and a group of assistants were also busy, soaking wet.Every day for five days, they moved 50-60 boxes of the collection to the machine for testing.

A blue-and-white, multicolor fish algae lid is carefully placed into an energy-dispersive X-ray fluorescence spectrometer, whose data is transmitted to a laptop computer and automatically compared with a Chinese academy of sciences database.After more than 10 minutes, this blue and white multicoloured can tire, color, glaze contains 16 kinds of trace elements content shows out.According to the test results, the relevant ingredients of this large pot are in good agreement with the data of blue and white colorful porcelain in the early 16th century (1501 — 1600), and the zinc oxide is high (0.552%), which belongs to jingdezhen kiln.A decade ago, the same Ming dynasty blue-and-white multicolored fish algae lid sold for 44 million yuan in Hong Kong, Mr. Guo said.A total of 15 pieces were tested this morning, all of which were real.

Guo hendong collection of antiques for more than 30 years, there are 6000-7000 pieces of collection, there are more than 3000 pieces of identification by the national cultural relics appraisal committee, one of which was identified as a national treasure, the national level, the second level of cultural relics is countless.Now, guo has brought in scientific instruments to challenge his vision and that of many experts.

It is the first time that yunnan ancient ceramic scientific testing laboratory has entered zhuhai.“Ophthalmology” has always been the most important method for the identification of ancient Chinese ceramics, shen said.However, each person’s vision is different, and the identification of the same ceramic often has different conclusions, affecting the collection and art investment market.Before the 1950s, the energy dispersive X fluorescence spectrometer was a mature technology in many fields, most of which were used in defense and materials science.From the 1950s, China began to apply this technique to the identification of ancient ceramics.Data on ancient ceramics have been accumulating since then, and a database has been established by the Chinese academy of sciences.At present, only the energy dispersive X fluorescence spectrometer in the laboratory of the Palace Museum and the ancient ceramic science detection laboratory of the yunnan collectors association are connected to the database.The energy dispersionx fluorescence spectrometer can identify the age and area of the constituent materials of ceramic clay, color and glaze.It’s just that the energy-dispersing X-ray fluorescence spectrometer, which used to work in tiny containers the size of teacups, can now fit into large containers 65 centimeters in diameter.“It has become a trend to combine ‘eye jian’ with ‘family jian’,” said shen.The Palace Museum has also set up a scientific testing laboratory and an energy-dispersive X-ray fluorescence spectrometer.When a committee of experts disagrees on the identification of an item, it USES technology to reach a final conclusion.“The instrument gives objective data. The historical value, cultural relic value, artistic value and market value of a collection need to be solved by ophthalmology.”

Yunnan collectors association ancient ceramics scientific testing laboratory is a semi-official institution, which started to identify collections for private collectors in China in 2008.The spectrometer can detect all elements in the periodic table except liquid and gaseous elements.The last flight cost 980 yuan.

Mr. Guo’s office has piled up a collection that has been tested and ready to be tested.Shen made a general judgment of each piece by means of “ophthalmology”, and then the staff of the laboratory measured the height, width, bottom and mouth of each piece before putting it into the instrument.“The core of the energy dispersion-x fluorescence spectrometer is a radium stick about the size of a garment needle. This radium stick has a lifetime, about 10,000 hours of use, and then it will decay,” said shen.Some collections have problems at first sight, or they are produced in private kilns with low value, so there is no need to use them.

The reporter saw a morning, detected about 15 to collect, besides that blue and white multicoloured fish algal grain lid jar, the biggest also is the most valuable is a late qing blue and white yunlong grain pomegranate honour, according to estimate market price 10 million yuan.

More than 200 pieces of the collection have been tested, some of which have been identified by the national committee of cultural relics appraisal.Most of the rest were in line with Mr. Guo’s judgment, except for a few.But these are also ancient imitation, non – modern works.

Huo hua, a researcher at the nanjing museum, said, “high imitation porcelain can be made according to the chemical composition formula of excavated porcelain, but trace elements cannot be mixed in.”Some experts say the energy dispersive X-ray fluorescence spectrometer is the enemy of forgeries because the amount of trace elements added to the forgeries to make them “just right” is beyond the forgers’ ability to do.Can counterfeiters add ancient porcelain powder to the forgeries to make them look real?Shen huayou smiled and said that this is not understand material science.Because China clay is mainly made of silicate, or cement.Can you tear down the house and make it into cement?It is as if scrambled eggs cannot be reduced to eggs.Still others say, deal with the instrument can “connect the tire”, half true.“That can only deal with the ‘thermoluminescence’ detection method, but it is not effective for the energy dispersed-x fluorescence spectrometer, because the spectrometer comprehensively detects the tires, colors and glazes, and the ‘contact tires’ will be exposed,” said shen.

Since an energy-dispersive X-ray fluorescence spectrometer is so effective, one on every antique street or shop will make collectors less afraid of being spooked.“In this way, there is no such thing as’ picking up a leak, ‘” Mr. Shen said with a smile.” in Chinese collecting culture,’ picking up a leak ‘is a great pleasure for collectors.”In addition, due to the radioactive material radium in the energy dispersing X fluorescence spectrometer, the relevant departments of the state have strict supervision over it, and it is impossible to let it “blossom everywhere”.

The ancient ceramic scientific testing laboratory of yunnan collectors association started to leave yunnan in 2009.Before this, many collection enthusiasts took the baby thousands of miles to yunnan to ask them to test, collections in the transport process often damaged.In 2009, the laboratory began the “scientific identification of Chinese folk collections 10,000 miles tour”, the first stop is guangdong.From shantou, jieyang, puning, to shenzhen, guangzhou, panyu, foshan, zhongshan and other pearl river delta cities.Guo handong also took a few collectibles rushed to panyu, machine testing.

This time, guo is ready to select 500 pieces from his collection to pass through the spectrograph’s lens.It will take 10 days to complete the inspection of more than 500 pieces if the inspection time is 10-20 minutes.Although guo handong’s collection of 3,000 pieces has been identified by the national cultural relics appraisal committee, shi shuqing, li binghui and others have drawn conclusions for his collection, but there are still many people questioned, guo handong this time to let science for his collection to testify.

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