A line engraving does not automatically achieve strong color contrast on every material. By filling the engraved groove with a different color after production, text, scales, and markings can become more clearly visible. This post-processing is often called colorfill.
Colorfill is a post-processing technique
The laser creates the groove; paint, lacquer, wax, or another suitable filler is then applied. This finish is not a standard part of an online laser cutting order at Het Laser Lokaal. Therefore, allow for your own testing and post-processing time.
Not every surface reacts the same way
On a smooth and non-porous surface, excess filling usually stays better on the surface, while wood, cardboard, and other porous materials can absorb dyes. A protective film can help with some sheet materials, but always check if it can remain in place during engraving and is suitable for your working method.
Only use products that, according to the manufacturer, are suitable for the chosen material. Solvents can, among other things, affect acrylic, coatings, and adhesive layers, or cause fine cracks. Therefore, first test paint, filler, and cleaning on a scrap piece.
A practical approach
- Carefully clean the surface and engraving of dust.
- Apply a small amount of suitable filler into the groove.
- Allow the product to dry or cure according to the manufacturer's instructions.
- Remove excess material without scratching or damaging the surface.
- Check adhesion, color, and wear resistance before finishing a full series.
Design for a legible result
Give lines sufficient spacing and avoid very small details that can become clogged during filling. Also, first check if the chosen material itself already provides enough contrast; sometimes a different material or engraving choice is simpler than extra post-processing.