All sapphire embossing styli made by me will need a "BREAK-IN-PERIOD" of 5 minutes you'll notice the surface noise will diminish afterwards.
I manufacture the only Embossing Sapphire Recording Styli made especially for recording polycarbonate and PETG record blanks.
Can be re-sharpened many times
Works very well on embossing MYSHANK black vinyl blanks too.
As shown with a magnification image of the stylus tip. This lathe embossing sapphire stylus made with an 87 degrees angle to match the standard groove made by a cutting sapphire stylus. Available for Westrex, Neumann, Audax, Grampion, Presto, RCA, and Rek-O-Kut cutter heads.