Shading glass engraving is achieved by varying the roughness of the engraved surface; the rougher the surface, the whiter it appears because it catches more light.
Essentially, the key to shading lies in controlling the texture created on the glass. A rougher texture reflects more light, creating a lighter, whiter appearance, while a smoother texture reflects less light, resulting in a darker or shaded effect. This is usually achieved with a rotary tool or drill.
Here's a breakdown of how to achieve different shades:
- Creating Lighter Areas (Highlights):
- Use a rougher stone or diamond burr.
- Apply more pressure while engraving.
- Make multiple passes over the same area.
- Use a coarser grit for a more frosted appearance.
- Creating Darker Areas (Shadows):
- Use a finer grit burr or polishing tool.
- Apply lighter pressure.
- Make fewer passes.
- Ensure the surface is smoother. Polishing compounds can help.
- Blending:
- Gradually transition between areas of different roughness to create smooth shading.
- Practice is key to mastering the technique.
In summary, to shade glass engraving, adjust the roughness of the engraved surface. Rougher surfaces appear whiter (highlights), while smoother surfaces appear darker (shadows), allowing for the creation of shaded effects.
