{"product_id":"mar-resistance-tester","title":"Mar Resistance Tester","description":"\u003ch2\u003eApplication of Mar Resistance Tester\u003c\/h2\u003e\n\u003cp\u003eWhat is Mar? A mar is a visible blemish or surface mark on a coating that covers a defined area and can be identified by differences in light reflection compared with the surrounding surface.\u003c\/p\u003e\n\u003cp\u003eThe Qualitest QualiMar™ Mar Resistance Tester is designed to evaluate the resistance of paint, varnish, and related coatings to surface marring. Similar to a scratch resistance tester, the instrument applies a controlled load to the coating surface. However, instead of a straight stylus, the Mar Resistance Tester uses an arc-shaped, loop-shaped, or ring-shaped stylus to assess the mar resistance of a single coating or the upper layer of a multi-coat system.\u003c\/p\u003e\n\u003cp\u003eFor testing, the coating system is applied at a uniform thickness onto flat test panels with consistent surface texture. Once the coating has dried or cured, the panel is positioned beneath the curved stylus. The stylus is mounted at a 45° angle and pressed against the test surface as the panel passes beneath it. The applied load is gradually increased until visible signs of marring appear.\u003c\/p\u003e\n\u003cp\u003eThe Mar Resistance Tester provides a practical method for comparing the surface mar resistance of different coating formulations. It is particularly useful for assigning relative performance ratings to coated panels that show substantial differences in resistance to marring. This test method differs from the pointed-stylus procedures described in ISO 1518-1 and ISO 1518-2, making method selection dependent on the specific testing requirements and application.\u003c\/p\u003e\n\u003cp\u003eThe Qualitest QualiMar™ Mar Resistance Tester complies with ISO 12137:2011, ASTM D2197, and ASTM D5178 standards. It provides a 100 g to 5,000 g load range for evaluating the mar resistance of coated test panels.\u003c\/p\u003e\n\u003ch2\u003eMar Resistance Tester Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable Test Speed: Working speed can be set from 3 mm\/s to 10 mm\/s to support controlled and repeatable mar resistance testing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDual-Adjustment Balance Device: Helps reduce test errors caused by uneven or irregular test panel surfaces.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMovable Working Table: Allows testing at different locations across the same coated panel for more flexible evaluation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdjustable Balance Arm: The liftable balance arm accommodates test panels with thicknesses ranging from 0 mm to 12 mm, supporting a wider range of coating and substrate configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMar Resistance Tester Technical Specifications:\u003c\/h2\u003e\n\u003ctable class=\"table\" border=\"1\" cellpadding=\"1\" cellspacing=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Power\u003c\/td\u003e\n\u003ctd\u003e15 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Distance\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeights\u003c\/td\u003e\n\u003ctd\u003e1×100 gram, 2×200 gram, 1×500 gram, 2×1000 gram, 1×2000 gram\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRing-shaped Stylus\u003c\/td\u003e\n\u003ctd\u003e\n\u003cul\u003e\n\u003cli\u003eDiameter: (6.5±0.1)mm\u003c\/li\u003e\n\u003cli\u003eR0.8±0.02\u003c\/li\u003e\n\u003cli\u003eThickness: (1.6±0.02)mm\u003c\/li\u003e\n\u003cli\u003eSmooth surface, hardness is Rockwell HRC56 to HRC58\u003c\/li\u003e\n\u003cli\u003eSurface smoothness: roughness ≤ 0.05 μm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStylus Moving Speed\u003c\/td\u003e\n\u003ctd\u003e3 mm\/s～10 mm\/s (step: 0.5mm\/s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngle Between Stylus with Test Panels\u003c\/td\u003e\n\u003ctd\u003e45°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable Test Panels Width\u003c\/td\u003e\n\u003ctd\u003e40 mm～110 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable Test Panels Thickness\u003c\/td\u003e\n\u003ctd\u003e0 mm～12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003eInput 110～240V AC 50\/60Hz (Power adapter output 24V, 2A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Size\u003c\/td\u003e\n\u003ctd\u003e540mm×250mm×375mm (L×W×H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e15kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrdering Information\u003c\/td\u003e\n\u003ctd\u003e\n\u003cul\u003e\n\u003cli\u003eQualiMar™—Mar Resistance Tester\u003c\/li\u003e\n\u003cli\u003eQualiMar™ ACC 1009---Ring-shaped Stylus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Qualitest USA LC","offers":[{"title":"Default Title","offer_id":53041716789559,"sku":null,"price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/1859\/1543\/files\/mar-resistance-tester770957648.webp?v=1790235601","url":"https:\/\/qualitest.us\/products\/mar-resistance-tester","provider":"Qualitest USA LC","version":"1.0","type":"link"}