Adtzpc Gem Jade Jewelry Scratch Tester, 2-9 Level Scratch Tester Hardness Test Pen With Storage Box, Dual Head And Metal Pen Barrel Design, Accurate Measurement For Testing Mineral Jewellery Jade

Adtzpc

【Mohs Hardness Pen】According to the hardness of different minerals, materials of different hardness are selected to simulate alternative minerals to make scratch pens similar to minerals, which are used to test the Mohs hardness of various material surfaces. 【Writing Needles At Both Ends】Each hardness pen has writing needles of different hardness at both ends. The Mohs hardness level is: 2&3, 4&5, 6&7, 8&9. Made of pure stainless steel, it has good texture and exquisite appearance. There are 4 hardness pens in the box, each 155 mm long. 【Test Method】Hold the pen at about 70 degrees to the ground in a pen-holding writing manner, press the corresponding hardness pen tip and do a scratch test on the surface of the object to be tested, draw a straight line, and observe whether there is a dent (destructive scratch) to judge the relative Mohs hardness level of the object to be tested. 【High-quality Materials】The hardness pen is made of 304 stainless steel, which is sturdy and durable. The hardness value is engraved on the pen head and the scratching needle of the hardness pen. It uses a boxed storage box to store various accessories in categories, keep them neatly stored, and convenient to carry. 【Wide Range Of Applications】Suitable for gemstones, cured epoxy concrete and other floors, ceramics, ceramic tiles, floor tiles, marble materials, mineral geological exploration, optical glass, mobile phone glass screen tempered screen, common glass relative hardness or wear resistance test.