BLACK

- As an aside, you may have heard the explanation that magnesium carbonate does not increase friction just by absorbing sweat from your hands. It has the power to generate a strong frictional force on

At the beginning of development, we thought about how to suppress the moisture returning to the microscopic gap between the hand and the rock, which was dried by chalk, and repeated trial production and verification to create BLACK. rice field. Of course, I should have been able to get the effect I was aiming for, but in 2020, after completing the experiment of the "non-slip sand ball" project at the Japan Agency for Marine-Earth Science and Technology, I found that the chalk itself has high friction performance.
The exact reason for this high frictional force is unknown, but scholars speculate that the subtle mix of scaly grains and normal grains seen under an electron microscope may be the secret to the strong coefficient of friction. That's what I'm talking about. Anyway, the world of friction is deep, and it seems that there are still many unknowns.