TOPCHANCES 3 In 1 Pencil Hardness Tester Tools Kit QHQ A Coating Hardness Tester Paint Films Scratches Tester 500/750/1000G Testing Tools

Requirements 1. GB1279-79 "General preparation method of paint film" preparation of three pieces, generally smooth tinplate 120*50* (O.2-0.3) mm, Or the substrate and size specified separately. 2. Test conditions: According to the product standard or construction requirements. Instructions: 1. Place the instrument flat on the test piece (if the test piece is smaller than the instrument, place the test piece in front of the instrument and place the spacer under the front of the instrument to keep the instrument level). 2. Use a blade to sharpen the pencil so that the protruding part of the pen is about 2-5mm, and smooth it in the sandpaper, then insert the pencil into the instrument, and make the pen core contact with the test piece and fix it. (Recommendation: pencil is six Edge shape, select a plane when fixed, After the test, rotate the two planes and fix the test, then rotate the two planes to fix the test. One circumferential surface can be used. Three times) Remove the gasket when testing. 3. Use the thumb and middle finger to grab the center of the two wheels. Move the instrument about 1-2 cm from the back to remove the instrument (do not add any pressure when pushing the instrument). Determine the hardness and see if the test piece has scratches. It is recommended that the test piece be made at least three positions and averaged. The number of hardness grades, standard pencils from soft to hard 6B 5B 4B 3B 2B B HB H 2H 3H 4H 5H 6H (13 total).

• Film hardness is a must-test indicator for quality certification in the paint manufacturing and coating use (coating) industries. Pencil scratch test for film hardness is a commonly used test method.
• The instrument can be used in the laboratory, or on the construction site, and the hardness of the film can be identified in any direction.
• Structure and working principle. The instrument is mechanical, three-point contact with the surface to be tested (two points for the wheel, one point for the lead core) always ensures that the pencil forms an angle of 45° with the surface to be measured, and the force level pushes the movement of the instrument to complete the test process and determine the coating film. The ability to resist deformation.