Selecting the appropriate gloss meter hinges on understanding the application of different measurement angles. In accordance with international standards (such as ASTM D523 and ISO 2813), common gloss meters feature 20°, 60°, and 85° measurement angles, each designed for surfaces with specific gloss ranges.
60° Universal Angle:Ideal for most semi-gloss to mid-gloss surfaces (approximately 10-70 GU). As the most prevalent angle in quality control, the 60° measurement is typically the default choice when the gloss level of a sample is unknown.
20° High-Gloss Angle:Engineered for high-gloss surfaces (exceeding 70 GU). This angle offers superior resolution for distinguishing between high-gloss variations and is widely used for automotive paints, high-end plastics, and printing varnishes.
85° Low-Gloss / Matte Angle:Used for measuring low-gloss or matte surfaces (below 10 GU). This angle effectively amplifies the visual differences between matte finishes and is commonly applied in architectural coatings, matte films, and specialty papers.
Many modern gloss meters now integrate multi-angle functionality (e.g., 20°/60°/85°), providing all-in-one versatility and significantly enhancing inspection flexibility. When procuring a gloss meter, it is advisable to base your selection on the primary gloss range of your products. Alternatively, opting for a multi-angle model is a strategic choice to accommodate diverse and evolving measurement requirements in the future.
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