For Type A and B test pieces, nick the test piece using the nicking device described in 6.5.1. Wet the blade with water or soap solution prior to nicking the test piece. Nick the test piece to a depth of 0.50 +- 0.05 mm (0.020 +- 0.002 in.) with a single stroke of the blade. If a nick die is used, the nick is formed when the test piece is cut from the sheet.