The xTool Glass Marking Pen is specially formulated for laser engraving on glass surfaces. It applies smoothly in white and transforms into a permanent black mark after engraving with the xTool F1 Ultra, delivering crisp, high-contrast results. The fast-drying, easy-to-clean, and eco-friendly formula makes it ideal for professional and creative engraving projects.

Key Features

• Designed specifically for glass laser engraving
• White ink turns into a permanent black mark after engraving
• Smooth ink flow with quick-drying formula
• Easy 3-step process: Apply, Engrave, Wipe
• Cleans off easily with water or a cloth
• Safe, eco-friendly formula (ASTM D-4236 compliant)
• Ideal for custom glass gifts, signage, and decorative projects