1, jade bracelet, under fluorescent lamp, there are fluorescent spots, which is not the standard for judging authenticity. I suggest you take some photos and upload them in natural light, so that I can give you detailed comments and evaluations.
2, Mida bracelet purple light blue light is fake. The real Mida bracelet jade will not change color under the purple light, and it is still the original color. The fake jade bracelet will appear blue and purple under purple light.
Generally speaking, yes, but they are all purple. If it is only one or two points in the carving, it may be that polishing powder remains on it. If it is really unclear, it is recommended to spend more than ten yuan to identify the agency.
4. This method is especially effective for jadeite dyed purple, which has a strong fluorescence reaction under purple light. Can fluorescence reaction really distinguish the authenticity of jadeite? Under the irradiation of ultraviolet lamp, the object emits blue or green light, which is the fluorescence reaction. This is a phenomenon that can be observed with the naked eye.
What light is used to shoot jade (what color is used to shoot jade)
Lighting with metal halide lamps can be divided into yellow light and white light, and even blue light is rare in the market (generally used in special environments or aquariums). Metal halide lamps have one characteristic, that is, they can generate strong light and illuminate a large area of space.
Purple jade bracelets are sensitive to light, so they will show different concentrations of purple under different colors of light sources; In yellow light, purple is more pink than in natural light, while in white light, the color is gray. Also, the clear water jade bracelet "can't hide" strong light.
Jadeite, jadeite and pearl products are mainly soft, and the color temperature is between 4500 K and 5500 K. It is recommended to choose LED lamps (because LED lamps have long service life, no radioactive harmful substances such as infrared rays, and the heat emitted is much higher than that of metal halide lamps). Can protect jewelry and jade very well.
Direct light: direct light can be used to identify jadeite, and the flashlight light source can be attached to the surface of jadeite for direct work. When the flashlight light source shines directly on the jade surface, it will be translucent and its charm will be relatively concentrated. Then, you can gradually translate the flashlight to observe whether the texture of jade is uniform.
The color of real jade will not change under purple light, and it has its original color, but if it is fake jade, it will appear blue-purple under purple light. And if it is B goods or B+C goods, it is blue and white fluorescence.
Then take an ultraviolet light source, aim it at a certain place of jade, and irradiate it at an inclination angle of 30 ~ 75. If the jadeite is still pure and bright, without fluorescence, discoloration and good transparency, it means that the quality of the jadeite is ideal.
Is it false that 365 purple light emits orange on jadeite?
Violet can't identify the authenticity of jadeite. The method of identifying jadeite by purple light is not accurate, but it can be used as an auxiliary identification.
The method of testing the authenticity of jade by purple light mainly depends on the color and internal structure of jade under the irradiation of purple light. Under ultraviolet light, real natural jadeite has no fluorescence reaction. Under the soaking of chemicals, a large number of resin chemicals remain in jadeite, and fluorescence will appear under the irradiation of purple light.
Ultraviolet fluorescent lamp: purple light can be said to be a good helper to identify jadeite. Putting jadeite under purple light, natural jadeite has no fluorescence reaction. If it is dyed jadeite, it will have a fluorescent reaction.
Emerald with fluorescence reaction must be treated; Without fluorescence reaction, it can't be proved to be real jade. True jadeite does not fluoresce under ultraviolet light, while epoxy resin as filler of B jadeite fluoresces under fluorescent light. Therefore, the jadeite dyed by acid washing can be identified by ultraviolet lamp.
When you look at jadeite with purple light, you need to observe jadeite under purple light. Generally, fake jadeite will have fluorescence reaction under purple light, while natural jadeite will not have fluorescence reaction under purple light.
In this case, the description is true. In fact, purple light is not a high-tech to detect jade. It can only emit ultraviolet rays, which will turn yellow under purple light, while the fluorescent agent is irradiated by ultraviolet rays.
Ask the great god: 365 purple light does not reflect jade B, what is the reason?
When you observe yellow light under purple light, it is because jadeite contains other metal components, such as copper or iron, which will emit color when exposed to light. Under normal circumstances, injection is needed to normally emit the unique green fluorescence of jadeite.
Natural jadeite doesn't shine. If it is B goods or B+C goods, there will be blue and white fluorescence. B the filler of jadeite, epoxy resin, will fluoresce under fluorescent lamp. Emerald dyed by acid washing can be identified by ultraviolet lamp. Fluorescence reaction can only be used to exclude fakes, but it cannot be proved to be genuine.
Pickling and bonding become what we call B jadeite or B+C jadeite; True jadeite does not fluoresce under ultraviolet light, while epoxy resin as filler of B jadeite fluoresces under fluorescent light. Therefore, the jadeite dyed by acid washing can be identified by ultraviolet lamp.