Paberi pinnatugevuskatses kuumutatakse erineva kõvadusega vahasid ja kantakse need testitavale paberi pinnale ja kui nad on jahtunud, tõmmatakse need pinnalt eemale ja kuna vahad on nummerdatud kõvematele vahadele määratud suuremate numbritega, nii et mida suurem on eemaldatud vaha number, seda tugevam on paberi pinnatugevus.
In the wax pick test, waxes with different hardness are heated and applied to the surface being tested. When they have cooled they are pulled away from the surface. The waxes are numbered with higher numbers assigned to harder waxes, so the higher the wax pick number, the stronger the surface strength of the substrate.
