Commonly Used Materials of Laser Engraver and Engraving Technology Methods

I. Understanding Grayscale Performance in Laser Engraving

Traditional mechanical engraving struggles to achieve varying point thickness economically, limiting its grayscale expression. In contrast, laser engraving, which relies on dotting, excels in grayscale performance. Leveraging grayscale designs offers cost savings and reduced coloring requirements while enhancing graphic depth. Users can input different grayscale levels into graphics (first converting text to graphics) and select black and white mode for engraving output, typically at an accuracy not exceeding 500dpi.

II. Laser Engraving Materials

1. Wood Engraving

   • Wood is a popular and easy-to-engrave material. Light-colored woods like birch, cherry, or maple are ideal for laser engraving. Different wood types have varying characteristics, with denser woods requiring more laser power.
   • Plywood: Engraving plywood is similar to wood, but avoid deep engraving to maintain a natural edge color.
   • Wood Carving: Wood carvings are usually intaglio with deeper carving depth. Adjust laser power and engraving speed for desired darkness.
   • Wood Cutting Depth: Laser engravers typically don't cut wood deeply. Maximum cutting depth depends on material and laser power.
   • Coloring: Wood engravings may have a burnt appearance. Laser power and engraving speed affect color depth. Acrylic pigments can be used for coloring.

2. Density Plywood

   • Ordinary Density Veneer: Laser engraving on this material yields uneven and black patterns that often require coloring.
   • Laser-Dedicated Density Veneer: Some MDFs are designed for laser engraving, providing even color without coloring.
   • Color Filling: Use acrylic or alkyd paint for color filling, setting graphics color to 60% gray for improved adhesion.

3. Two-Color Board

   • Two-color boards are engineered plastics used for engraving, offering excellent contrast and clear edges.
   • Carving: Laser engraving on two-color boards produces sharp contrast and clear edges. Mechanical boards may yield slightly less clear results.
   • Cutting: Cutting two-color boards should be done with care, avoiding slow speeds to prevent melting. Mechanical boards may require additional finishing.
   • Color Filling: Dots can express different colors, but if painting is necessary, engrave the painted area deeper. Use acrylic or alkyd enamel for coloring.

In summary, laser engraving provides superior grayscale performance and versatility in engraving materials. Understanding the nuances of materials and employing the right techniques ensures stunning results in various engraving applications.