Traditional Culture Encyclopedia - Photography and portraiture - False jadeite can't emit fluorescence even if it is irradiated by purple light.

False jadeite can't emit fluorescence even if it is irradiated by purple light.

Which flash is better?

1, the following three flashlights are recommended for evaluation. Personally, I think it's better, and I hope it can bring you some help.

2. Yongnuo 600 second-generation flash is better than Canon 600. The product category of Canon 600EX-RT is professional flash machine. Coverage of 20m-200m, maximum width 14mm, ultra-wide angle (with built-in wide-angle diffuser).

3, Yongnuo, Meikstand is good. I have used Stender, which is convenient to carry, with TTL and cheap. Compared with the expensive flash, the price is much better. It is also very popular with photographers, and the price is affordable for most people. Powerful functions make it easy for you to cope with all kinds of shooting.

4. Soft box and soft ball have their own unique advantages and disadvantages. Generally speaking, the soft light box is more flexible and has a larger filling area; The number of soft light balls is small, which is suitable for small scenes such as local lighting and indoor shooting.

Is the jadeite under purple light without fluorescence and without pickling?

1, the jadeite with purple light fluorescence reaction must be treated; Without fluorescence reaction, it can't be proved to be real jade. Ultraviolet lamp is a sharp weapon to detect jade counterfeiting, but it is impossible to detect jade counterfeiting from other materials.

2. After curing and bonding, it becomes what we call B-goods jadeite or B+C-goods 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.

3. After curing and bonding, it becomes what we call B-goods jadeite or B+C-goods 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.

Generally speaking, high-quality jadeite does not transfer water! The simplest thing is that there is nothing, no carving, and no decoration on the surface. This is called waterless transfer printing! Let's take a look at it with me! How to tell whether jadeite has been pickled? Look at the color: the surface color of the acid-washed bracelet is unnatural.

5. Exposure to violet light can also lead to fluorescence reaction on the surface. In addition, jadeite with fluorescence can only show that jadeite may be dyed by pickling, while jadeite without fluorescence can not completely show that it is really natural jadeite. If other natural jade materials are used as jadeite, there will be no fluorescence reaction under purple light.

How to identify jadeite with violet light

The method of identifying jadeite by purple light is as follows: If it is genuine jadeite, then under the irradiation of purple light, we will find that jadeite actually does not emit light, or a small number of jadeite will emit a small amount of light, but the light emitted is punctate.

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. This method is especially effective for jadeite to dye purple, and purple jadeite has a strong fluorescence reaction under purple light.

Purple light can identify the filled jadeite, that is, the jadeite that can identify B goods. The jadeite with fluorescence reaction under purple light must be treated; Without fluorescence reaction, it can't be proved to be real jade. Ultraviolet lamp is a sharp weapon to detect jade counterfeiting, but it is impossible to detect jade counterfeiting from other materials.

Can purple light identify the authenticity of jadeite?

1, Ziguang 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.

2. The method of purple light to test the authenticity of jade: mainly depends on the color and internal structure of jade under purple light irradiation. 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.

3. Ziguang cannot identify the authenticity of jadeite. The artificial jadeite is added with epoxy resin, which will emit fluorescence under the irradiation of purple light. However, the natural jadeite has not been treated, and there are many impurities in the stone, which will also have a fluorescence reaction under the purple light, so the purple light can't identify the authenticity of the jadeite. Distinguish between true and false jadeite, you can look at the color.

4. UV lamp can identify jadeite filling. Emerald on the market now is usually divided into four grades: A, B, C and B+C. The so-called A goods are what we often say about natural jadeite, B goods refer to jadeite artificially filled, C goods refer to jadeite artificially dyed under high pressure and high temperature, and B+C goods refer to jadeite both filled and dyed.

5, ultraviolet fluorescent lamp to see: purple light can be said to be a good helper to identify the true and false jade. Putting jadeite under purple light, natural jadeite has no fluorescence reaction. If it is dyed jadeite, it will have a fluorescent reaction.

6. The method of purple light to identify the authenticity of jadeite is as follows: If it is genuine jadeite, then under the irradiation of purple light, we will find that jadeite actually does not emit light, or a small number of jadeite will emit a small amount of light, but the light emitted is point-shaped.