Pencil hardness has always been a good testing device for paint film hardness. But the pencil Hardness Tester mainly relies on the trolley to row after all, so there will be unevenness in speed. At the same time, the part held by the fingers may have the problem of gravity fluctuations caused by the uneven force on both ends. All kinds of situations may have more or less influence on your experimental results.
With the development of domestic industrial capabilities, these manually operated instruments have gradually acquired new tricks. For example, the electric pencil Hardness Tester below can bring new solutions to the above two problems. Similar to this are automatic film coating machines, electric scraper fineness gauges, etc. To be honest, the upgrading of equipment in the coating industry is really slow, and I hope that the technical R&D personnel of manufacturers in the industry can develop more new equipment.
