Cross Hatch Adhesion Testing
A cross hatch adhesion test is used to check the adhesion of a coating over the applied substrate. 
This is by drawing over the surface the cutting blades and then firmly applying clear adhesive tape applied over the hatch markings
and on removal the adhesion result is based on the amount of paint product is removed .
For further information see: https://www.elcometer.com/en/coatings-inspection/all-coatings-inspection.html