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 85ยบ)
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
https://www.lisungroup.com/news/technology-news/what-is-gloss-and-its-measurement-method.html

Comments

Post a Comment

Popular posts from this blog

What are the differences of FMVSS 302, UL94 and IEC60695 for flammability test?

Image
The flammability of different materials, such as plastics and other materials used in items such as automobile interiors, electronic devices, and electrical appliances, is evaluated using a number of different standards. Some of these standards are FMVSS 302, UL 94, and IEC 60695. Nevertheless, there are a number of important distinctions between these standards: FMVSS 302 is a specialized standard that was designed for the automotive industry to analyze the flammability of materials used in car interiors. Its purpose is to measure the combustibility of these materials. The UL 94 standard is a more comprehensive regulation that assesses the combustibility of a variety of materials, including plastics, and has applications in a number of different sectors. IEC 60695 is a global standard that is used in the process of assessing the potential for electronic and electrical equipment to catch fire. Testing Procedures The flammability of materials is determined using a variety of testing ...
Read more
Image
125 Grounding Contact Test 125.1 Grounding receptacles having a 5-15R,5-20R，6-13R，6-20R，7-15R，14-15Ror 15-15R configuration are to be subjected to the tests in this section. 125.2 Previously untested devices are to be used. Each device is to be mounted in a flush device box, or as otherwise intended, with its face in a vertical plane. A nonmetallic faceplate is to be installed if intended. A solid 14 AWG (2.1 mm2) copper conductor is to be connected to the receptacle grounding terminal. GNGPL SB1610_AL 125.3 With the receptacle oriented to create the maximum contact displacement (possible distortion of contact affecting its contact ability), the test pin A. Figure 125.1 is to be fully inserted in the grounding contact. A 5 lb (2.27 kg) weight is to be gradually suspended form the test pin 6 inches (152 mm) from the face of the receptacle. The weight is to be applied for 1 minute, following which, the weight is to be removed. The application of the weight is to be repeated with the rece...
Read more
Image
Accessible parts of equipment with standard IEC 62368 General An accessible part of an equipment is a part that can be touched by a body part. For the purposes of dctermining an accessible part, a body part is represented by one or more of the specified test probes. Accessible parts of an equipment can include parts behind a door, panel, removable cover, etc. that can be opened without the use of a tool. Accessible parts do not include those that become accessible when floor standing equipment having a mass exceeding 40 kg is tilted. For equipment intended for building-in or rack-mounting, or for subassemblies and the like for incorporation in larger equipment,accessible parts do not include those that are not accessible when the equipment or subassembly is installed according to the method of mounting or installation specified in the installation instructions. A part is considered accessible if the instructions or markings intended to be followed require that a person phys...
Read more