Low Reflectivity of Vacuum Plating in ShenZhen
There may be the following reasons that affect the low reflective rate of vacuum plating: 1. ** The background vacuum of the vacuum coating chamber **: It not only affects the film's cohesion, but also the reaction with the reaction gas during the evaporating process. The other residual gases will be vaporized and decomposed under the effect of high temperature and electric field, affecting the purity of the reaction gas, thus polluting the surface of the vacuum coating and reducing the reflection rate of the vacuum coating. 2. ** Bias voltage **: For the vacuum coating decorative film, the bias voltage is generally selected to be 0 - 30 volts. If the bias voltage is too high, reverse splashing will occur, which will affect the deposit rate and affect the luster of the vacuum coating layer, which may affect the reflection rate. 3. ** Purity of plated metal and reaction gas **: If the purity of plated metal or reaction gas is not enough, the reflection rate may be reduced. 4. ** Evasion rate **: If a low rate is chosen to sufficiently react the reaction gas with the evaporated film material particles in the reaction vapor plating process, it may affect the performance of the film, such as the reflective film. A low rate may lead to a decrease in the reflective rate. 5. ** The combination of the film and the film layer **: There may be harmful impurities attached to the surface of the film during the processing and cleaning process, such as water vapor, oil and gas, cleaning liquid, wiping liquid, polishing powder, etc. The impurities that go deep into the damage layer are difficult to remove with ordinary methods. When the film material molecules accumulate on these impurities, it will affect the film layer attachment and may reduce the reflection rate. In addition, if the films had poor water affinity, poor absorption power, or poor chemical stability, the surfaces of the films would be corroded to form a corrosion layer or a decomposition layer during the pre-processing process, which would affect the absorption of the film layer and thus affect the reflection rate. 6. ** Film stress **: There will be stress during the film formation process. The stress of each layer of the multi-layered film is different. The existence of stress is harmful to the film strength and may affect the optical properties of the film, including the reflection rate. For example, the stress may cause the film to crack or form a network of fine channels, thereby reducing the reflection rate. 7. ** Film structure related to the surface hardness of the outer layer **: For example, the anti-reflective film is generally made of MGF2, and its film profile is a loose cylindrical structure, which may affect the optical properties such as surface hardness and indirectly affect the reflection rate. Read more exciting novels for free
Tile Reflectivity Reduces
The reflection of ceramic tiles is affected by many factors. The following are some of the factors that may reduce the reflection of ceramic tiles: - ** Tile Type **: Judging from the "skin" of the tiles, namely the glossiness, the glossiness of the mat tiles is lower, and its reflection rate is lower than that of the bright tiles. For example, bright bricks were high-gloss tiles, which had extremely high reflection under natural light and light, while dull bricks did not have such high reflective ability. - ** Tile Color **: Dark colored tiles have a relatively low reflective rate. For example, dark gray tiles have a relatively low reflective rate, while light gray tiles have a relatively high reflective rate. - ** Special Craftsmanship **: For example, the Cezanne Impression 36° Skin Brick has a reflection rate of less than 60%. It is achieved through special research and development technology. Through the introduction of advanced equipment and technological innovation, other functions such as wear resistance reaching level 4 and hardness reaching level 6 - 7 are met, while the reflection rate is reduced. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reflectivity of various materials
The following are the reflections of some common materials: - [Bright Wood: Reflectivity of 35 Gray] - ** Matt Wood **: Reflectivity of 35 gray. - ** Mirror stainless steel **: Reflectivity of 255 gray. - ** Sub-surface stainless steel **: Reflectivity of 200 gray. - ** Brushed stainless steel **: Reflectivity is a decaying texture (black part of the texture). - ** Porcelain **: Reflectivity: 255 fresnel. - [Sub-surface stone material: Reflectivity of 100 gray] - ** Polished tiles **: Reflectivity: 255. - [** Ordinary floor tile **: Reflectivity: 255.] - ** Wooden Floor **: Reflectivity 70. - [Clear Glass: Reflectivity: 255] - ** matte glass **: Reflectivity: 255. - ** Ordinary fabric **: No information about the degree of reflection is mentioned. It is estimated that the degree of reflection is low (it is an opaque material, and its luster and reflection are generally low). - ** Flannelette **: No information about the degree of reflection is mentioned. It is speculated that the degree of reflection is relatively low (it is an opaque material, and its luster and reflection are generally low). - ** Hair carpet **: No information about the degree of reflection is mentioned. It is estimated that the degree of reflection is low (it is an opaque material, and its luster and reflection are generally low). - [** Leather **: Reflectivity: 50] - ** Water Material **: Reflectivity of 255. - ** Screen window **: Refraction is a grayish-white texture. The degree of reflection is not explicitly mentioned. It is speculated that the degree of reflection is relatively low. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Gold Plating Technique
The common gold plating process was as follows: ** 1. Electroplating process ** 1. ** Deconstruction and cleaning ** - Alkaline washing: Use an alkaline solution such as a solution of soda to remove organic matter such as grease. - Acid washing: use sulfuric acid, sulfuric acid and other acid cleaners to remove the metal surface of the rust layer and rust. - Washing with water: removing the residue after the alkali-washing and acid washing. 2. ** Undercoat ** - selecting Ni, copper, and the like as the plating base material, using the object to be plated as the negative pole, Ni or copper as the positive pole, and dissolving the positive pole through the current in the bath to form a plating base layer on the surface of the object to be plated. The methods of plating the base layer include plating, chemical plating, and the like. 3. ** Gold Plating ** - Metal gold was used as the material, and the metal gold of the positive pole was dissolved and plated on the negative pole (the object that had been plated) through the current in the bath. The thickness of the gold plated layer could be adjusted from a few millimeters to dozens of millimeters according to the needs. 4. ** Electrolyte adjustment ** - The composition and process conditions of the Electrolyte were adjusted. The commonly used Electrolyte components were acidic cyanide-based Electrolyte and alkali-based Electrolyte to ensure that the coating was uniform, smooth, and stable. 5. ** Post-processing ** - Washing: Remove any remaining liquids. - Neutralization: Neutralize acidic and acidic residue. - Dry: Remove moisture. - [Polishing: Makes the gold-plated layer brighter and smoother.] ** 2. Electroless Gold Plating Technique ** - The product that needed to be gold-plated was placed into the gold-plating solution. The melted gold atoms reacted with the chemical to form a gold-plated layer on the product. The chemical gold-plating did not require a direct power supply. ** 3. Other gold-plating process examples ** 1. ** Copper and Brass Gilding ** - Using organic liquids to remove oil: Use gasoline or carbon dioxide to remove the oily stains on the electronic components. - Supersonic chemical oil removal: This step is carried out after the oil removal with organic solution is completed. - Washing: Hot water, cold water, acid washing (a mixture of sulfuric acid, nitric acid, and water), and soaking in a solution of soda. - Gold plating: Use a gold plating solution that contains gold potassium cyanide and potash to carry out gold plating. - Washing and drying: Wash with ultrasonic agitation in purified water at 70 - 80 ° C (the electrical conductivity of purified water should be less than 10us/cm) for no less than 10 minutes, and finally dry. 2. ** Phosphor Bronze Gilding ** - Gasoline to remove oil stains: First, use gasoline to remove the oil stains on the electronic components. - [Supersonic chemical oil removal: This step will be carried out later.] - Washing and acid washing: hot water, cold water, and acid washing. - Gold Plating: Use a gold-plating solution containing gold potassium cyanide and potash to plate gold. 3. ** Gold-plated process of special golden finger lead wire (a special case)** - The processing of the printed circuit board (PC) was to form a connection module with broken gold-plated leads on the outer circuit. - "Ink resistance printing: Print a carbon ink resistance between the connecting modules at both ends, and use the carbon ink resistance to conduct the connecting modules at both ends. - Gold-plated: Use the connection module and carbon ink resistance to gold-plate the predetermined gold-plated pad position of the printed circuit board to complete the production of the golden finger. There were the following steps to recover and refine the gold-plated waste: - To prepare the gold removal powder, add the gold removal powder into hot water, stir it to accelerate the dissolution, and let it settle. - Gold removal: The electronic waste was added to the gold removal water, and the agitation accelerated the gold removal. - Acid adjustment: After removing the gold, add lemon acid to adjust the acid. Stir to accelerate the dissolution and test the acid. - "Substitute oxidization: Add in the zinc-wire, and after two hours of substitution, it will be oxided. Then, add in the solute to start the oxidization. - Impurity removal: such as adding impurity removal agent, heating to remove impurities, cleaning sponge gold, etc. In addition, there was another gold-plating process, which was three spraying and two baking, that is, spraying the primer → drying → spraying the reaction layer → spraying the topcoat → drying. The novel "Gilded Palm" is equally exciting. Everyone is welcome to click and read it!
Refractive index Transmittance Reflectivity
1. ** Refractive Index ** - The index of refraction reflected the ability of the lens to reflect light. When light entered different media, the angle would change, and this phenomenon was represented by the index of refraction. When the light beam is close to normal incidence (the angle of incidence is approximately equal to zero), the calculation formula for the reflection rate is related to the true index of refraction of the two media (that is, the index of refraction relative to vacuum). In different optical phenomena and calculations, such as the study of thin films on thick surfaces, as well as the measurement of the thickness and refraction index of samples in the low absorption region, the refraction index was an important factor. For example, in the experiment of measuring the thickness and the refraction index of the sample in the low absorption region, in order to accurately measure the surface toughness and the refraction index, it was necessary to fit the relevant curve. 2. ** Transmittance ** - The transmission is related to the reflection, and the sum of the two is 1 (Ras+Tas = 1). In some studies, such as the study of the optical properties of samples in the low absorption region, it would involve extracting the optical properties of the film from the transmission data, but this method may lack accuracy. There may be difficulties in fitting the transmission data. For example, when measuring the thickness and refraction index of the sample in the low absorption region based on the classical transmission line method (TLM) principle and method, it is difficult to find the fitting parameters of each function and lack accuracy when fitting the cos (?) based on the transmission. 3. ** Reflectivity ** - The percentage of the radiation energy reflected by an object to the total radiation energy is called the reflection rate. The range was that the reflection rate was less than or equal to 1. Different objects had different reflective rates, mainly depending on the nature of the object itself (surface condition), as well as the wave length and angle of the incident electromagnetic wave. Among the common types, the planet's refraction was an important physical quantity that described the physical properties of the planet's surface. For example, Venus's refraction was 76%, Mercury's was 10%, Earth's refraction was roughly between 35% and 43%, seawater's refraction (refraction) for short-wave radiation was 5%, and white ice and snow's refraction was 30 - 80%. Opaque media such as mirrors had a reflection rate of 100%, while non-mirrors were related to factors such as color, temperature, and light attributes. The magnitude of the reflective rate of a transparent medium was related to the angle of incidence of light. The larger the angle of incidence, the greater the reflective rate. For example, when light entered a light sparse medium from a light dense medium, when the angle of incidence reached a critical angle, the phenomenon of total reflection would occur. When the angle of incidence was less than the critical angle, it would be partial reflection. In the calculation of some optical phenomena, there were also calculation formulas related to the reflection, such as Vs =(sin(Theta1-Theta2)/sin(Theta1 + Theta2))^2 (Rp=(tan(Theta1-Theta2)/tan(Theta1 + Theta2))^2), etc. In some optical experiments and theoretical research, the reflection data could also be used to extract the optical characteristics of the film. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The usage of gilding and gold-plating
Gold gilding and gold-plating were essentially the same process. The first step was to prepare the gold amalgam. First, the gold had to be thinned and cut into pieces, then placed into a pre-heated crucible, and then injected with mercury. The ratio of gold to mercury was 1:5 - 1:7, so that it was mixed into a paste. During this process, the surface of the object needed to be cleaned with an acid and base solution. Then, it was time to apply the gold. The gold amalgam was evenly applied to the surface of the object (such as bronze). Next was to crack the gold. By baking the plated object, the mercury would evaporate and the gold would remain on the surface of the object. Finally, it was calendering to make the coating more dense and bright. When the operation was done, the color of the coating could remain unchanged for a long time. This kind of craft could be used to decorate building components such as copper and iron and various utensils. In ancient times, apart from being used on the surface of utensils, it was also used to gild weapons. The entire process usually needed to be repeated about three times, but to achieve a better gilding effect, it was common to repeat it five to seven times. The novel "Gilded Palm" is equally exciting. Everyone is welcome to click and read it!
What is the plot of 'Plating Sun' manhwa?
It's a story that involves elements of adventure and fantasy. The main character embarks on a quest to uncover hidden secrets and faces various challenges along the way.
Reflectivity of Ground Surface in Near-infrared Wavelands
Different objects had very different near infrared reflections. Plants have unique characteristics in the near-infrared band. There is a steep slope of reflection between 0.8 - 1.0um and a peak near 1.1um. The soil did not have obvious peaks and valleys. The finer the soil, the higher the reflection rate. The higher the organic matter content and the higher the water content, the lower the reflection rate. Water had a strong absorption in the near-infrared band, and the reflection rate was almost zero. The reflection rate of pure water was zero, and the reflection rate of clear water with chloride-containing water peaked in the green light band. The reflection rate of turbid water and silt water was higher than that of pure water, and the peak appeared in the yellow band. The spectral curves of snow, wheat, wet land, deserts, and other objects were different, and the near infrared reflection rate was also different. Snow, wheat (normal wheat and infested wheat had different spectral curves), and so on all had different near infrared reflection characteristics. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
vacuum novel
Based on the information provided, there was no specific genre of novels that was specifically named " vacuum novels." However, there was a science fiction novel, The Perfect Vacuum, which used the same unique writing method as Lyme Rhapsody, which was to review fictional writing. Most of the 16 works in the book were far away from science and technology and fantasy. They were more reflective and satirical of the philosophical speculation of human society. If you're asking about a novel related to the concept of " vacuum," the only book related to this is currently available in the reference information. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Diagram Analysis of Flux and Gold Plating
When analyzing the reaction mechanism between the flux and the gold plating layer, it was necessary to consider the situation of different bottom gold plating. For the mainstream method of nickel-based gold plating, during the welding process, the actual welding layer was related to the bottom layer of nickel-based alloy, that is, the tin alloy and nickel-based alloy formed a metal compound (Sn-Ni <2> compound). However, the purity of the gold-plated layer, the rate of voids, and the cleanliness of the surface directly affected the solderability of the contact body. When there was a nickel-plated bottom layer, the inertia of the nickel-plated part was higher than that of the gold-plated part, which could ensure a higher resistance to atmospheric corrosion. During welding, the flux and the bottom layer of nickel-plated part would have a smelting reaction, and the gold-plated layer might affect the welding process due to its own characteristics, but it was not the main reaction layer. As for the gold plating on the copper base, the copper base had a certain role in the welding. The copper ions easily penetrated into the gold coating and caused the gold coating to change color. Moreover, the copper coating was easy to be deactivated in the air and affected the cohesion of the gold coating. When the flux was in contact with the gold-plated layer of this structure, on the one hand, it had to deal with possible problems such as the possible oxidization of the copper surface to achieve good welding. On the other hand, the gold-plated layer was affected by the change of the copper layer and showed different solderability during welding. However, this method was rarely used at present. As for the silver plating, due to the lack of sufficient information, it was difficult to accurately analyze the reaction principle between the flux and it. It was only known that when the silver plating layer was contaminated, the black color would appear through the pores of the coating. This process was rarely used (except for special requirements). Generally speaking, when the flux was used in the welding process related to the gold-plated layer, it would be affected by the properties of the underlying metal under the gold-plated layer and the characteristics of the gold-plated layer (such as purity, voids, cleanliness, etc.). The reaction principle of the gold-plated layer and the flux with different underlying structures would have different performances in the welding process. The smelting change of the underlying metal during the welding was a more critical part, but the characteristics of the gold-plated layer could not be ignored. Under the joint action of many factors, the welding effect would be affected. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Sky of ShenZhen
The sky in Shen Zhen showed a variety of scenes. Judging from the weather conditions, there would be fine weather, such as when the sun continued to shine, the temperature would rise steadily, and the sky would show different beauty under such weather. There would also be bad weather, such as when the sky turned black a second before the arrival of a typhoon, when the wind howled and the rain poured down. There would also be a thunderstorm and a yellow warning signal. From a natural landscape point of view, the sky in Shen Zhen sometimes had amazing floating clouds. When the blue sky was combined with urban buildings, such as the high-rise buildings on Shennan Avenue with blue sky and white clouds as the background, they formed a special urban outline. The skyscrapers and white clouds set off each other, and the white clouds in the glass curtain wall building blended with the blue sky and white clouds outside the building to form a unique scenery. In addition, there might be a super beautiful sunset in the evening, and occasionally you could see astronomical sights such as comets. In some specific places, such as Yunhai Square at the top of a 380-meter-high mountain, one could see the blue sky above Dapeng Bay from the east and the sky above the bustling downtown area from the west. The scenery under the sky here was the embodiment of the perfect blend of the city and nature. The novel " The Legend of Dian Kingdom in Clouds as Deep as the Sea " is equally exciting. Everyone is welcome to click and read it!