Jade polishing methods include toothpaste, sandpaper and grinder. Wash the jade with toothpaste, squeeze it into toothpaste, brush it back and forth, wash off the toothpaste foam on the jade, then coat a layer of edible oil on the jade surface and put it in a cool and ventilated place to dry. After natural air drying, jade will become bright.
There are two ways to polish jade: mechanical polishing and manual polishing. Mechanical polishing is accomplished by using a vibrating machine with emery and polishing powder. The operation method is simple, but it is not suitable for particularly fine polishing. There are many equipments used for manual polishing, and jade velvet needs to be polished according to specific conditions.
Jade polishing First of all, jade should be polished before polishing, which is also called "roughening", that is, the surface of jade carving semi-finished products should be polished more finely and smoothly with a "rubber mill", which is some simple preparations before polishing. In fact, there are two kinds of jade polishing: hard light and glue light.
Where can Changchun identify jadeite?
Changchun jade testing institution, I think it is in Changchun Technical Supervision Bureau and Quality Supervision Center. Changchun Antique City may also have an appraisal agency. But I don't know if it's official.
You can go to Tongzhi Street, where there is a shop selling jade, which is very professional. His manager is also a senior jewelry and jade appraiser! I identified an emerald ornament there last year, but I don't believe it. . I remember his name was Ding Xin Jewelry! You can go and have a look. .
Identification of jadeite can go to the local jewelry and jade quality supervision and testing center, which is more authoritative. In addition, in some jade crystal wholesale distribution centers, such as Sihui, Donghai and other cities, there will also be gem testing institutions.
Who knows the address and telephone number of Changchun professional jade jewelry testing and appraisal institution? Please tell us, thank you. ...
1. If you want to identify jade, you can also go to the Jewelry and Jade Quality Inspection Center. Generally speaking, every provincial capital city will have a jewelry and jade quality supervision and testing center. This institution was originally affiliated to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources, and it is also very authoritative.
Secondly, auction is a very dangerous investment. Everyone must consider the risks before they participate, otherwise both people and money will be lost. You don't have such an institution over there. Antique auctions are currently concentrated in Shanghai, Beijing and Qingdao. Collectors must compare and know more before participating. I wish you a fortune.
3. To identify jadeite, you can go to the local jewelry and jade quality supervision and testing center, which is more authoritative. In addition, in some jade crystal wholesale distribution centers, such as Sihui, Donghai and other cities, there will also be gem testing institutions.
4. Qualification of testing institutions, and the formal quality inspection certificate of jewelry and jade must be a nationally recognized testing institution. The inspection certificate must be printed with any one of cma, cal and cncal. China Metrology Certification Association consists of national or provincial metrological certification and accreditation institutions and accredited metrological certification units.