Stone - Test engraving concrete

In preparation for the Prom of the Landesschule Pforta, the students of the final year considered earning part of the cost of the ball by selling garden torches.

The parent representatives developed a mold and cast the torches out of concrete. Students wrapped the wick out of burlap and melted wax to fill the torches.

To make the torch a real eye-catcher, the school logo was supposed to be attached. As part of an analysis, we checked how long an engraving on concrete takes, how good the quality in the end is and whether the process is suitable for series production.

Unfortunately, it turned out that engraving concrete is very time-consuming, so this processing method did not really pay off for the project. The torches simply would have become too expensive.

In addition, the laser removes the fine sinter layer of the concrete. Underneath lies a somewhat coarser-grained layer which further crumbles in the course of transport and use. Over a longer period of time, the edges of the lasered logo would probably break off and it would look a bit frayed.