זכוכית — UV (F2 Ultra UV)

Baseline starting point for a 5W UV laser (xTool F2 Ultra UV). UV marking is a cold process — start conservative and run a small test, then raise power / lower speed for a stronger mark. UV marks glass with a fine frosted mark without cracking — no spray/coating needed. ~60% power follows xTool's glass guidance; add speed or drop power if the surface chips.