1 verified settings · manufacturer data · co2 glass laser · Updated January 2026
| Operation | Speed (mm/s) | Power (%) | Passes | Air Assist | Notes |
|---|---|---|---|---|---|
| engrave | 325 | 20% | 1 | — | LightBurn Library: Scan [bidir=true, overscan=0] |
The Boss Laser LS-1420 100W cuts Mirror Back cleanly at 325 mm/s with 20% power. Always test on a scrap piece first — every machine is slightly different, and variables like tube age, lens condition, and material batch can shift results.
For Mirror Back, the key variables to dial in are speed and power. If the laser isn't cutting through cleanly, slow down or add a pass before pushing power higher — excessive power causes charring and wider kerfs. Air assist is highly recommended for wood and organic materials to clear smoke and protect the lens.
Once you find settings that work, save them in Laser Lab to build your personal settings library. The AI predictor uses your calibrated results to suggest starting points for new materials automatically — so the more you log, the smarter it gets.
For cutting Mirror Back on the Boss Laser LS-1420 100W, start at 325 mm/s speed and 20% power. These are manufacturer-verified starting points — always test on scrap first.
Air assist is not required for Mirror Back on the Boss Laser LS-1420 100W according to manufacturer data, though it can still help reduce smoke and improve cut quality on organic materials.
The manufacturer recommends 1 pass to cut through Mirror Back at 325 mm/s and 20% power. If the cut isn't clean, try reducing speed slightly before adding more passes.
Incomplete cuts are usually caused by incorrect power, speed, or focus distance. If edges are charred, try increasing speed or reducing power. If the laser isn't cutting through, reduce speed or increase power — or add an extra pass. Also verify your focal distance is correct for the material thickness and that your lens is clean.
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