Laser Engraving: From Design to Polishing

The book details the entire process of making laser-engraved glass, from design to polishing, covering key technical points such as three-dimensional modeling techniques, laser parameter settings, and material selection.Through practical examples, he explains how to avoid flaws in carving, and shares his polishing experience, helping those who love handicrafts to quickly master the methods of making personalized handicrafts.

Key preparations in the design phase.

Key points of 3D modeling.

For designing on a computer, he suggests using modeling software such as Blender or ZBrush, which is user-friendly for beginners.The most important thing to remember is to leave enough thickness in the bottom of the model to give it adequate support. If it is too thin, it will crack when you try to carve it.When encountering a complex design, it is possible to try layering the design, separating the main subject from the background.

Material selection.

If you're making a piece to give away, K9 crystal is probably the best choice, since it is highly transparent.He has to be careful not to leave any air bubbles or impurities in the material, which will be especially noticeable in the finished sculpture.

Step by step, laser engraving.

Experience with parameter settings.

The parameters of the laser machine must be adjusted in accordance with the power output of the laser.For example, for a 40-watt machine, the depth of the cut should be controlled between 0.5 and 1 millimeter.If the image is very detailed, remember to set the scanning speed to less than 300mm / s.At first he suggested using scraps of material to test the machine and find the best combination of parameters.

Common problems.

If there are scorched marks on the carving, it's probably because the focal length wasn't adjusted properly.At this point, the optical path must be re-aligned and the cooling system checked to make sure it is functioning properly.If the edges of the image are blurry, try lowering the power and increasing the number of scans. Although it will take more time, the results will be much better.

Polishing and post-processing.

Mechanical polishing.

Use a wool wheel with cerium oxide polishing compound, and don't let the wheel spin faster than 2000 rpm, or you may round off the edges.The focus is on the edges of the carving, and the method should be like wiping a table, with a smooth and even movement.The polishing time is controlled to three to five minutes. If too long, it will actually lower the transparency.

The secret of hand polishing.

If you have trouble getting rid of polishing compound in the corners of your eyeglasses, try dipping a soft toothbrush in alcohol and using it to scrub them clean.Finally, when you wipe it with a chamois cloth, remember to wipe in one direction. This will prevent you from leaving fine lines.When the piece is finished, it is placed in a dust-proof box for half a day to allow a protective layer to form over the surface.