xTool Black Laser Marking Pen For Glass - 2 Pack

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A high-precision marking pen specially designed for glass. The ink is white when applied, but after laser engraving with the xTool F1 Ultra, it leaves a clear, permanent black patt ern. The ink flows evenly, writes smoothly, dries quickly, is clean and efficient, and is safe and environmentally friendly. Easy to clean, simply wipe with a cloth or rinse with water after engraving. The formula is safe and environmentally friendly, compliant with ASTM D-4236 standards. Simple and efficient to use, just three steps: apply, engrave, and wipe, making it easy to master. Clean the surface of the item to be engraved before use. Press the pen tip multiple times until ink flows during the first use. Compatible with blue-light lasers, CO2 Lasers, Fiber lasers & MOPA lasers Show more