#Glossmeters

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How to Measure Gloss using a Gloss Meter

Gloss is an essential component of how our eyes interpret the shape and form of things. The finish of a product, its texture, as well as the way a sample is lighted and seen, may all have an effect on the impression of gloss. Surfaces that have a high reflectivity are viewed as being glossy, shiny, or lustrous, while surfaces that have a lower reflectance are regarded as having a semi-gloss or matte finish. There are a few different methods that may be used to evaluate gloss. Using a piece of optical equipment known as a gloss meter is one of the methods. A gloss meter gives quantified gloss measurements, given in gloss units (GU). How to Measure Gloss Gloss is assessed by shining a light beam of consistent intensity onto a test surface at a predetermined angle, and then observing the quantity of light that is reflected off of the surface when seen from the same angle as the light beam. A glossmeter is used to determine the level of this material’s specular reflectivity. Various surfaces need varying reflective angles. High Gloss: Clear reflections of pictures are produced by surfaces that have a dazzling or highly polished quality. This particular reflection is brought about when the light that strikes the surface reflects off of it in a specular direction. Semi & Matt Gloss: Surfaces with a semi-glossy or matte finish reflect pictures with less crisp detail and less intense brightness. Light not only reflects in a specular direction on semi-glossy or matte surfaces, but it also scatters, causing the reflected image to look more diffused than specular. Figure: Gloss meter Choosing the Correct Angle for Gloss Measurement Gloss is quantified in terms of the quantity of light that is reflected off of a surface in comparison to a polished glass reference standard. Gloss units are the standard for measuring gloss (GU). The angle of incidence, as well as the characteristics of the surface, play important roles in determining the quantity of light that is reflected off of it. Matte, semi-gloss, and high-gloss are the three different levels of gloss. Beginning with a gloss meter that has been adjusted to an angle of incidence of sixty degrees is the best way to select the measuring angle that will provide the most accurate results. If the result is between 10 and 70 GU, the coating is considered to have a “semi-gloss” finish, and the glossmeter should be set at the 60° angle when measuring it. If the result is less than 10GU, the product is considered to have a “low gloss,” and the glossmeter should be adjusted so that it reads at an angle of 85°. If the result is greater than 70GU, however, the product is considered to have a “high gloss,” and the glossmeter should be adjusted so that it reads at an angle of 20°. 85% Reflectance While the Gloss Unit (GU) scale is linear, the measurement ranges for each angle of incidence are distinct: 0–2000GU for 20°, 0–1000GU for 60°, and 0–160GU for 85°. The percentage of reflectance is calculated by comparing the amount of light energy that is transmitted and received by a gloss meter. This value is then expressed as a percentage of the full measurement range of the angle of incidence, and the value is displayed as a percentage relative to the angle of incidence that was selected. A gloss meter calibrated for 20 degrees has a measuring range of 0 to 2000 GU; hence, a value of 1000 GU at 20 degrees would be stated as 50, while a value of 500 GU would be expressed as 25. A value of 500GU at 60°, yet it would be represented as 50 since the measurement range for the 60° is 0–1000GU. The glossier the surface is, the closer the value will be to being exactly 100%. There are several substances that may have measurement values that are more than 100GU. Some examples of these substances are clear plastics and varnishes. Metals with a high degree of reflectivity may have gloss levels as high as 2000GU. In addition, the value of the measurement may be raised for transparent materials owing to many reflections in the bulk of the material, which might cause this. In each of these circumstances, it is usual practice to describe the findings of the measurements in terms of the percentage of reflectance. Haze (HU) Haze produces a decrease in the contrast that is reflected and causes ‘halos’ to emerge around the light sources that are reflected, which substantially reduces the visual quality. In line with ASTM D4039, the term “haze” is defined inside the LISUN Gloss Meter as the numerical difference that exists between the specular reflectance measured at 60 degrees and 20 degrees. This is measured in Haze Units (HU). Glossmeters (also Gloss Meters) LISUN provides a complete selection of single, dual, and triple angle glossmeters as well as DOI meters. These instruments evaluate the gloss, percent reflectance, and haze of a variety of different surfaces. The LISUN AGM-500Pro Glossmeter may be purchased as either a basic entry-level gloss meter at 60 degrees or as a cutting-edge Single, Dual, or Triple Angle Glossmeter with the ability to detect haze and percentage reflectance respectively. Read the full article

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What Is a Gloss Meter? Know about its Measurements and Standards

A specific material or items gloss level, from shiny to semi-gloss to matte surfaces, straightforwardly influences how that material or item is seen outwardly by others. Organizations work to acquire specific gloss levels for their items for both practical and tasteful purposes, as well as to make them stand apart from their rivals. Subsequently, it is urgent for organizations to comprehend how to gauge gloss utilizing a gloss meter since utilizing the right norms will empower them to reliably produce great merchandise. It is critical to go for presumed Gloss Meter Suppliers to get great quality.

By enlightening a surface with a particular measure of light and estimating the reflectance, gloss not set in stone. The surface decides the point of the light and the strategy used to evaluate reflectance. This is completed by the instrument Caltech gloss meter. Gloss meter is appropriate for Applications: Car, Paints and covering, Added substance, Ink, Marble, Plastics, Stone, Clay, rock, vitrified cleaned tile, earthenware block and plastic, paper; equipment ventures, and so on.

Figure out more about the gloss meter underneath in our itemized article.

What is Gloss Meter?

A Gloss Meter is an instrument that is utilized to gauge gloss by focusing a light at a specific point on the test surface while likewise estimating how much reflection. The gloss meter point and, hence, the gloss meter model are subject to the sort of surface being estimated. The gloss is estimated utilizing the gloss unit (GU).

Gloss meter standards: A gloss meter estimating scale, known as Gloss Units (GU), depends on a standard piece of profoundly cleaned dark glass with a foreordained refractive file and a specular impression of 100GU at the given point. On a perfectly matte surface, this standard is utilized to adjust an upper point at 100 and a lower endpoint at 0. Since most non-metallic coatings and materials (paints and plastics) exist in this reach, this scaling is suitable for them. More significant levels can be accomplished for different materials that show up profoundly intelligent (mirrors, plated or incomplete metal parts), arriving at 2000 Gloss Units. Because of various inside appearance in straightforward materials, these qualities can likewise be raised.

Understanding use of gloss meter: The Caltech India gloss meter estimates the example’s gloss utilizing the guideline of light reflection. In particular, at the specific point of frequency and pillar. To create a light emission pointing toward the specular reflection point, the example is presented to radiation at a portion of 5%. Light source, focal point, collector, show interface, and so forth make up a gloss meter. The two kinds of equal optical ways and joined optical ways make up its estimation standard.

Want to Know about its Measurements and Standards?

Then click here: https://www.caltechindia.com/what-is-a-gloss-meter-know-about-its-measurements-and-standards/

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Analytical optical detector - colorimeter, glossmeter

The colorimeter and glossmeter developed and produced are optical testing instruments. The reason why these instruments can measure the color difference, gloss, chromaticity, and image clarity of various products is due to the optical principles of their internal design. Learning optical knowledge is very helpful for the use and analysis of color difference meters and glossmeters. People can see that color and light density are inseparable. Only in the visible spectrum can we clearly see color through the naked eye. Generally, the wavelength of visible light that the human eye can feel is 400 nm (purple) to 700 nm (red), and the visible spectrum is a small part of all electromagnetic spectrum. There are thousands of colors in the world, among which red, green, and blue are known as the three primary colors. Changes in the ratio of red, green, and blue can produce multiple colors, and equal mixing of the three can reproduce white. The concept of complementary color: The color formed by subtracting color X from white is called the complementary color of color X. White red=cyan cyan White Green=Magenta magenta White blue=yellow yellow White Red Green Blue=Black Complementary color characteristics: When we use an X complementary color filter, we will find that the primary color corresponding to the complementary color will be filtered out. Names of primary colors and corresponding complementary colors: There are two ways to achieve color reproduction: Primary color addition: All three primary colors are added to form white, and any two primary colors are added to form complementary colors that do not participate in the synthesis. Subtraction of primary colors: All three complementary colors are added to form black, and any two complementary colors are added to form a primary color that does not participate in the synthesis. In these two methods, the addition of primary colors is relatively simple, which is the addition of other colors formed by the addition of primary colors. However, this method is rarely used in practical life; The primary color subtraction method is to subtract the corresponding primary color from white to form other colors, which is to use complementary colors to superimpose to form other colors. It is relatively common in applications. We have introduced the knowledge of color above, but in fact, color definitions and concepts are not widely used in chromatic aberration meters, glossmeters, and other instruments. At most, they are optical concepts. Below, we will briefly explain optical knowledge. The law of linear propagation of light: Light travels in a straight line in a uniform medium. Fermat's law is the first consideration in the development of glossimeters. The so-called Fermat's law refers to the fact that when a beam of light propagates in vacuum or air, medium A transmits to the interface of medium B, it is generally divided into two types of light beams: reflection and refraction. Reflection law: The reflection angle is equal to the incident angle, and i (reflection angle)=i '(incident angle). The brightness of the mirror surface depends on the viewpoint, and the surface brightness varies with the viewing angle. This is why the current glossmeter is divided into 20 °, 60 °, 85 °, 120 °, and other angles. In fact, the measurement principle of a glossmeter is an ideal diffuse surface that reflects incident light uniformly in all directions, and its brightness is independent of the viewpoint and is a constant. Refraction law: n1 sin i=n2 sin r The refractive index of any medium relative to vacuum is called the absolute refractive index of the medium, referred to as the Index of Refraction. In the formula, n1 and n2 represent the refractive indices of the two media, respectively. The phenomenon of light refraction is caused by the different propagation speeds of light in different media. The refractive index depends on the properties of two different media and the wavelength of light. The absolute refractive index of a medium in an ideal vacuum is: n=c/v (c is the speed of light in the vacuum, and v is the speed of light in the medium) From the above formula, we can see that in a medium with a large refractive index, the speed of light is relatively low; In a medium with a small refractive index, the speed of light is relatively high. Diffraction of light: During the propagation of light, when light encounters obstacles, it will deviate from the straight line, which is called diffraction of light. Due to the short wavelength of light, it is difficult to detect diffraction phenomena in daily life. Diffraction not only causes the geometric shadow of an object to lose its clear outline, but also produces a series of bright and dark lines at the edges. Relatively complex optical knowledge is commonly used in our colorimeters. We all know that colorimeters are an optical color detection device developed using optical principles and color detection optics. This instrument has a very complex internal structure and is a precision instrument. There are many applications of optical theory. We can see these from "Analysis Principle of Chromatograph". Focus When light rays parallel to the optical axis enter a convex lens, the ideal lens should be that all the light rays converge at a point and then spread out in a conical shape. This point where all the light rays converge is called the focal point. Circle of dispersion Before and after the focal point, light begins to gather and diffuse, and the image of the point becomes blurred, forming an enlarged circle called a diffusion circle. Different manufacturers and film areas have different numerical definitions of allowable circle of diffusion diameter. The image perceived by the human eye is greatly related to magnification and viewing distance. The allowable dispersion circle for a 35mm photographic lens is about 1/1000 to 1/1500 of the diagonal length of the negative. The premise is that the image is enlarged to a 5x7 inch photo with a viewing distance of 25-30cm. Depth of field There is an allowable dispersion circle before and after the focal point, and the image blurring presented on the bottom surface is within the allowable range of the dispersion circle. The distance between these two diffusion circles is called depth of field, that is, the depth of field where the image still has a clear range before and after the subject (focus). The depth of field varies with the focal length, aperture value, and shooting distance of the lens. For fixed focal lengths and shooting distances, the smaller the aperture used, the greater the depth of field. Based on the camera holder, the distance from the focal point to the near allowable dispersion circle is called foreground depth, and the distance from the focal point to the far allowable dispersion circle is called back depth of field. The larger the lens aperture, the smaller the depth of field; The longer the focal length of the lens, the smaller the depth of field; The shorter the focal length, the greater the depth of field; The closer the shooting distance, the smaller the depth of field. Compared to instruments with relatively complex internal results such as colorimeters and glossometers, it is relatively simple to use color light boxes and transmission light boxes. The main optical principles they apply are the color temperature, wavelength, and illuminance of light. Combining these factors, color comparison is performed. Gloss meters AGM-580 are mainly used in the surface gloss measurement for paint, plastic, metal, ceramics, building materials. It conforms to the DIN67530, ISO2813, ASTM D523, JIS Z8741, BS 3900 Part D5, JJG696 standards and so on. Portable Colorimeter/Chroma Meter is an innovation color measuring tool with powerful configuration to make color measurement easier and more professional; It support Bluetooth to connect with Android and ISO devices, Portable Colorimeter/Chroma Meter will take you into a new world of color management; It can be widely used to measure color value, color difference value and find similar color from color cards for printing industry, paint industry, textile industry, etc. Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab. Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test. Please feel free to contact us if you need any support. Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381 Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997 Read the full article

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Caltech is one of the best Inspection Equipment manufacturers & suppliers for coating, corrosion, cathodic protection & welding inspection needs. 

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What is gloss and its measurement method

Gloss is one aspect of visual perception. Considering the psychological impact of products on consumers, it is as important as color. It is defined as “surface attribute”, which makes the object approximate to the shiny or shiny metal texture appearance. Gloss The glossiness of the object surface will be affected by many factors, such as the smoothness after polishing, the quantity and type of coating used, and the quality of the substrate. The manufacturer constantly designs glossy products such as highly reflective car panels, glossy magazine covers, satin black fashion furniture, etc. to maximize the attention of consumers. Gloss is very important for products. Therefore, the gloss value can be obtained by continuous testing of each product or different batches of products. Gloss can also be used to measure the surface quality. For example, the glossiness of the surface coating is reduced, indicating that the surface may need to be reprocessed; Other factors that lead to the reduction of gloss value include low viscosity of paint or insufficient quantity of surface coating. It is these factors that many manufacturing industries need to test the gloss of products, such as automobiles, printing, furniture, food, pharmaceuticals and electronic products. How is gloss measured? Gloss is measured by shining a certain amount of light on the surface of an object, and then quantifying the amount of reflected light. The test method of light angle and reflection is determined by the object surface and surface appearance. Therefore, the appropriate angle should be selected to measure the gloss. The NHG268 glossmeter conforms to ISO2813 and GB/T9754 (Chinese national standard). The three angles can fully cover the gloss of all surfaces. The unit of gloss is (GU), which can be traced to the reference standards of BAM (Germany), NRC (Canada) and NPL (UK). Medium gloss (universal angle): 60 ° 60 ° is the measurement angle applicable to all surfaces. It is also used as the reference angle when measuring the surface with low gloss 85 ° and high gloss 20 °. Low gloss: 85 ° To improve the resolution of low-gloss surface. The gloss can be measured at 85 °. When the glossiness value of the object surface measured at 60 ° is lower than 10GU, the 85 ° angle is recommended. When measuring different gloss texture or slightly uneven surface with 85 °, it is necessary to take the average value of multi-point measurement. High gloss: 20 ° 20 ° measuring angle can improve the resolution of high-gloss surface. When the photometric value of the object surface measured by 60 ° is higher than 70GU, it is recommended to select 20 ° angle for measurement. The 20 ° angle (light path) is very sensitive to the fog phenomenon on the object surface. Because fog shadow is a unique phenomenon of high-gloss surface. Precautions for using glossmeter: This instrument is a precision measuring instrument. During the measurement, the drastic changes in the external environment of the instrument should be avoided, such as the flicker of ambient light and the rapid change of temperature. During the measurement, the instrument shall be kept stable, the measuring mouth shall be close to the object to be measured, and shaking and displacement shall be avoided; This instrument is not waterproof and cannot be used in high humidity environment or water mist. Keep the instrument clean, avoid water, dust and other liquid, powder or solid foreign matters entering the measuring caliber and inside the instrument, and avoid impact and collision on the instrument. After the instrument is used, it shall be shut down, and the instrument and standard board shall be put into the instrument chamber for safekeeping. The instrument shall be stored in a dry and cool environment. Users are not allowed to make any unauthorized changes to this instrument. Any unauthorized change may affect the accuracy of the instrument and even irreversibly damage the instrument. Gloss meters AGM-580 are mainly used in the surface gloss measurement for paint, plastic, metal, ceramics, building materials. It conforms to the DIN67530, ISO2813, ASTM D523, JIS Z8741, BS 3900 Part D5, JJG696 standards and so on. AGM-580_Gloss Meter with 3 Angles (20, 60 and 85º) AGM-500PRO Gloss Meter with Single Angle: AGM-500PRO_Gloss Meter with Single Angle Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab. Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test. Please feel free to contact us if you need any support. Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381 Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997 Read the full article

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