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In addition to injection molding, dyeing, combination stone and inlaying, there are also methods of padding, waxing or oiling. Although mat color, waxing or oil-filled jade is rare in the market, it is still necessary to pay attention.
The recognition of the mat color jade: the mat color jade is in the transparency, but the back of the five-color jade product is painted green, and then the painted surface is set in the metal frame without the window. As long as you look carefully, it is not difficult to find that the color of the pad is not green, dazed, lack of spirituality; the color is boring inside, there is no layering, and sometimes there are cracks on the color surface.
Identification of waxing or oil-filled jade: For cracked jade products, such as bracelets, ring faces or small pieces, use wax, cedar oil or epoxy resin to squeeze into cracks under high pressure and high temperature conditions. After the observation by the naked eye, it is difficult to find flaws. The identification method is:
1 Under the microscope, small bubbles in the wax product or liquid in the crack can be found.
2 The waxing product is dull and dull, and gently touched with two bracelets. The sound is boring.
3 After the oil-filled jade jewelry, there is interference color in the crack. As long as it is under certain heating conditions, oil will seep out. Some oil-filled jade surface seems to have a white film. Under the irradiation of long-wave ultraviolet light, there is blue-yellow fluorescence. issue.
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