Red mark: Mohs 2-3 level Yellow mark: Mohs 4-5 level Green mark: Mohs 6-7 level Blue mark: Mohs 8-9 level Glass hardness plate (hardness is about 5.5), quickly distinguish hard and soft minerals Metal hardness plate (hardness value is about 3.5) Grit strips are used to grind pen tips to keep them sharp Scratch plates are used to test the stripe color of minerals 4 double-test-head Mohs hardness pens Each Mohs hardness pen has two hardness test levels and dual test heads; the test heads are wiped clean after each use, long service life, good durability, at least 3-5 years of use. High Quality Mohs hardness test components, made of high-quality metals and alloys, with hardness values ​​equivalent to 2 to 9 on the Mohs hardness scale TEST CONDITIONS For best results in hardness testing, the hardness must be sharp and the mineral surface must be smooth and flat to avoid jamming or sinking in the scratch test, which will form a clear groove, otherwise the hardness point will scratch the surface of the mineral and may leave a streak that can be rubbed. TEST INSTRUCTIONS In order to determine the hardness of the mineral relative to the Mohs hardness, perform a scratch test to select the appropriate hardness. Test from soft to hard with the strength of the pen until the number that can scratch is selected, and the number of scratches that the material under test can withstand can be obtained. SCOPE OF USE Commonly used for determining the Mohs hardness of floor tiles, floor construction industry, daily glass, optical glass, mobile phone glass, bathroom ceramics, handicraft ceramics, marble products, rock specimens, mineral ores, gemstones, jade objects, industrial porcelain, and other product surfaces. Name Mohs hardness tester Model 2-9 level (Mohs hardness test head for alloy metal) Specifications Four double test heads: 2-3 level, 4-5 level, 6-7 level, 8-9 level Size 210*130*145mm Net weight about 0.5KG