3 thoughts on “How should there be a layer of black objects on the surface of the gold?”
Nathan
I think that root is not a matter. Do n’t remove it. Your gold surface may not be smooth. There are very small granules. The visible light is a kind of electromagnetic wave in physics. Only electromagnetic waves between 0.38 microns and 0.78 microns can cause people's visual experience. Is when the light is illuminated to a certain substance, because the physical characteristics of the substance are different, it will selectively reflect the light wave of a certain wavelength on its surface and act on the retina, which will cause the corresponding color feeling. The colors that people feel through their eyes are objective because of the existence of light and people's normal visual nerves. The reflection rates of different color reflection in different objects are different. We see that the grass is green because the grass reflects the green ability is the strongest. Black objects are because it absorbs almost all frequencies, and we see black when there is no light reflection. When the white light is shot to the surface of the opaque object, some wavelengths of the wavelength are absorbed by the object and the light of some wavelengths is reflected. The light of different wavelengths has different colors, what color is the reflected light wave, and what color is the object. For example, trigly pointer reflects green light, it is green; sulfur reflection yellow light looks yellow. If the object absorbs all the light of the wavelength, it is black, and if it reflects, it is white. Is when any solid is subdivided to smaller than the light wavelength, it loses the original color and luster and is black. In fact, all solids appear black in the state of ultra -microphone. The smaller the size, the dark the color, the silver -white platinum (platinum) becomes platinum black, gold becomes black, iron powder becomes black, and white magnesium oxide becomes black.
It can be immersed in the heat solution for 2 hours. The thermal solution should be prepared in advance: 100 grams of water, add 15 grams of bleaching powder, sodium 15 grams of bicarbonate and 5 grams of salt. Then use hot water and sodium bicarbonate solution (1 kg of water plus 1 teaspoon of sodium bicarbonate). Gold (GOLD) is a single form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and most valued metals. Internationally, gold is generally based on ounces, and ancient China was used as a gold unit. It was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
I think that root is not a matter. Do n’t remove it. Your gold surface may not be smooth. There are very small granules. The visible light is a kind of electromagnetic wave in physics. Only electromagnetic waves between 0.38 microns and 0.78 microns can cause people's visual experience.
Is when the light is illuminated to a certain substance, because the physical characteristics of the substance are different, it will selectively reflect the light wave of a certain wavelength on its surface and act on the retina, which will cause the corresponding color feeling. The colors that people feel through their eyes are objective because of the existence of light and people's normal visual nerves.
The reflection rates of different color reflection in different objects are different. We see that the grass is green because the grass reflects the green ability is the strongest. Black objects are because it absorbs almost all frequencies, and we see black when there is no light reflection. When the white light is shot to the surface of the opaque object, some wavelengths of the wavelength are absorbed by the object and the light of some wavelengths is reflected. The light of different wavelengths has different colors, what color is the reflected light wave, and what color is the object. For example, trigly pointer reflects green light, it is green; sulfur reflection yellow light looks yellow. If the object absorbs all the light of the wavelength, it is black, and if it reflects, it is white.
Is when any solid is subdivided to smaller than the light wavelength, it loses the original color and luster and is black. In fact, all solids appear black in the state of ultra -microphone. The smaller the size, the dark the color, the silver -white platinum (platinum) becomes platinum black, gold becomes black, iron powder becomes black, and white magnesium oxide becomes black.
It can be immersed in the heat solution for 2 hours. The thermal solution should be prepared in advance: 100 grams of water, add 15 grams of bleaching powder, sodium 15 grams of bicarbonate and 5 grams of salt. Then use hot water and sodium bicarbonate solution (1 kg of water plus 1 teaspoon of sodium bicarbonate).
Gold (GOLD) is a single form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and most valued metals. Internationally, gold is generally based on ounces, and ancient China was used as a gold unit. It was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
Burning with fire, concentrated hydrochloric acid, dilute sulfur pickling