Mar resistance test, is similar to scratch test to coatings, but in different way: this is to abrasion the coatings that evenly covered on the subjects by circular needle in 45°, and keep abrasion tell the coating is broken. The minimum load for coating scratches is the load that causes at least 2 out of 5 measurements.
This machine is designed under GB/T 31591-2015 "Determination of abrasion resistance of color paints and varnishes" standard.