Color measurement steps of colorimeter: Nowadays, the commonly used color measuring instrument in the coating field is the color difference meter (mainly divided into spectrophotometer and photoelectric integral color difference meter). The x, y and Y, namely the chromaticity coordinates and the brightness factor can be obtained by measuring the sample plate by the instrument. Through the chromaticity diagram, you can know the position of the measured color in the chromaticity diagram. In order to make the color space more in line with the color difference of visual observation, x, y, and Y are transformed into a*, b*, L* values ​​through a series of conversions, where the a* value represents the red and green phase (positive value...

When ultraviolet rays are irradiated, the degree of eye injury is proportional to the time, inversely proportional to the square of the distance from the source, and related to the projection angle of the light. Regarding the harm of ultraviolet rays to human health: When ultraviolet rays act strongly on the skin, photodermatitis can occur, and erythema, itching, blisters, edema, eye pain, tearing, etc. appear on the skin; severe cases can also cause skin cancer. Ultraviolet rays act on the central nervous system, causing headaches, dizziness, and increased body temperature. Acting on the eyes, it can cause conjunctivitis, keratitis, called photoophthalmia, and may also induce cataracts. The ultraviolet rays generated during the...

Precautions for the use of ultraviolet germicidal lamps

With hardware components, hardware furniture, and hardware daily necessities gradually entering people's lives, the spraying of paint on the surface of hardware becomes particularly important. The paint thickness on the surface of hardware components is not only related to its protection, anti-corrosion, and anti-wear performance, but to a greater extent, it is also closely related to the decorative aesthetic performance. In addition to causing cost waste, a thicker paint coating will also be visually bulky and prone to cracking of the paint film. Under normal circumstances, with the help of paint coating thickness gauge, the thickness of the paint layer on the surface of standard hardware components should be about 30 microns. The...

The role of car paint meter LS220 The basic function of the dry film thickness gauge is to accurately detect the actual thickness of the dry film/paint film. The detected value can help people judge whether the thickness of the car model meets/exceeds the standard. The dry film thickness gauge is an important instrument to measure the thickness of the coating sufficient to ensure corrosion protection. 3. Testing of car paint meter For the magnetic method, the magnetic properties and surface roughness of the base metal of the standard plate should be similar to those of the base metal of the test piece. For the eddy current method, the electrical properties of the base metal of the standard sheet should be similar to those of the base...

Ultraviolet disinfection lamps have been widely used in my country since SARS in 2002, and ultraviolet disinfection equipment also played an important role in this year's H7N9 epidemic. In our daily life, it is necessary to use ultraviolet light to sterilize. In the process of ultraviolet sterilization and disinfection, it is necessary to ensure the intensity of ultraviolet radiation. The instrument for detecting the intensity of ultraviolet radiation is called an ultraviolet illuminance meter. Ultraviolet disinfection is something that we often come into contact with in our daily lives. The most common hospitals use ultraviolet lamps to irradiate and kill viruses. They are also commonly used for food safety disinfection and water...

Note: When using ultraviolet disinfection lamps, keep the environment clean. There should be no dust and water mist in the air. When the indoor temperature is below 20 degrees Celsius or the relative humidity exceeds 50%, the exposure time should be extended. After scrubbing the floor, wait until the floor is dry before disinfecting with ultraviolet lamps; when using ultraviolet lamps to disinfect indoor air, the room should be kept clean and dry, reduce dust and water mist, and the temperature is lower than 20 degrees Celsius or higher than 40 degrees Celsius, and the relative humidity is greater than 60% When using ultraviolet to disinfect the surface of the article, the surface of the irradiated surface should be directly irradiated...

The new type of coronavirus is coming fiercely, and ultraviolet light and medical alcohol can kill the new type of coronavirus. This article will explain in detail why ultraviolet light can kill the new type of coronavirus. At the beginning of 2020, the hearts of hundreds of millions of people have been held by the new coronavirus pneumonia. When the epidemic broke out, people hoarded all kinds of medical and daily necessities out of self-protection or panic, and they also raised many questions. For example, can ultraviolet lamps kill the new coronavirus? The author summarized it by inquiring a lot of information for your reference. Let me start with the conclusion: ultraviolet light can kill the 2019 new coronavirus, which is medically...

If a second-hand car is in the case of an accident, there must be traces of sheet metal or spray paint repair on the body paint, and the scope of repair will be relatively large. Therefore, as long as the detection of second-hand accident vehicles is involved, it is necessary to do paint inspection items to reveal the history of large and small accidents that have occurred in the vehicle, and to determine whether the vehicle is an accident vehicle. It can be said that if you understand the paint finish of the vehicle, you can roughly understand the history of the car and the accident. Of course, if you want to fully and accurately determine whether the vehicle is a technically recognized accident vehicle, you still need a professional...

I believe everyone should be familiar with the dry film thickness gauge, which is a professional instrument used to measure coating thickness. But most people should feel a little unfamiliar to hear about fire-resistant coatings for steel structures. Although the name is relatively long, it is essentially a fire-retardant coating, only applied to the surface of steel materials. The dry film thickness gauge has played a very important role in the selection of fireproof coatings for steel structures. Dry film thickness gauge plays an irreplaceable important role in the process of selecting fireproof coatings for steel structures. Fire prevention is an important theme that cannot be avoided in daily life. Then the steel structure...