Jade jewelry is often waxed after carving to increase its aesthetic feeling. Therefore, jade ornaments cannot contact with acids, alkalis and organic solvents. Even if it is not waxed jade ornaments, because they are mostly mineral aggregates, long-term contact with acid and alkali should be avoided. These chemicals will corrode the surface of jade jewelry. In addition, don't put jade jewelry in the box for a long time. After a long time, jade ornaments will also "lose water" and dry. Wearing it for a long time will make the color of jewelry dim. At this time, you can go to a reputable jewelry store to polish and renovate. Re-renovation and polishing will make your jade jewelry as bright as new and glow with infinite charm.
For jadeite, the last process of processing is waxing. Waxing is to coat a thin layer of wax on the polished surface of jadeite to make it smoother and more shiny. This process has not changed the various properties of jadeite itself, so waxing is also considered as an optimization process. However, some jadeites in this province are loose in structure, which means that the planting moisture of jadeite is poor and the rough moisture is dry. Some merchants often put these things in a wax bath when waxing, that is, soak the finished jadeite in melted paraffin for a period of time, and let the paraffin soak along various cracks on the surface of jadeite, which will make things look better. If the jadeite texture is relatively compact, the wax is only immersed in the surface layer. After waxing jadeite, the pits and holes on the surface can be filled up, and the luster and transparency of the surface are enhanced. If the jadeite is loose in texture or pickled in various ways, including the traditional Yangmei soup, the pores of jadeite will increase, resulting in more paraffin filling into jadeite. It is clearly stipulated in the national jewelry and jade appraisal standard that jadeite with too much wax is regarded as treated jadeite, and jadeite soaked with too much wax will produce white flowers due to the aging of wax over time, which means that the transparency of jadeite (that is, the head of jadeite) becomes worse. Some jadeites only have this change for half a year because of the poor quality of wax. Therefore, the filling process of this wax is different from waxing, which can be called wax dipping treatment.
Wax dipping treatment is different from pickling and glue pouring treatment. The jadeite treated with wax has not been acid-washed with strong acid, so the structural damage is not strong, which has no obvious effect on the durability of jadeite. On the other hand, the structure of natural jadeite itself is quite loose, such as jadeite with coarse grain structure. But as long as there is too much wax, the transparency of jadeite may crack due to the aging of wax, which can be regarded as waxed jadeite. This kind of jadeite is difficult to distinguish with the naked eye. Therefore, consumers should pay great attention to the purchase process.
Waxed jadeite and waxed jadeite have the following distinguishing features:
1. Observe with ultraviolet fluorescence. The ultraviolet fluorescence of waxed jadeite is stronger than that of waxed jadeite, which is generally blue-white fluorescence with moderate intensity, and even has strong blue-white fluorescence.
2. Detect with infrared absorption spectrometer. Infrared absorption spectrum can better distinguish waxed jadeite from waxed jadeite. Waxed jadeite has a strong wave number absorption peak of 2925cm- 1, which is close to zero transmittance, that is, close to the bottom line, while waxed jadeite has a weak wave number absorption of 2925cm- 1, which is far from the low line.
When testing the infrared spectrum of the sample, we should pay attention to whether there is a wax layer on the surface of the sample, especially the jade flower part, and the wax in the pit is not cleaned up. The wax layer on the surface will affect the test results of infrared spectrum and the authenticity of ultraviolet fluorescence.
3. Repair of waxed jadeite.