While fiber laser cutting is a versatile and effective process for a variety of materials, some substances are challenging or impossible to cut with a laser.
Highly reflective materials, such as polished metal or mirrors, can reflect the laser beam back into the machine, which can damage the optical system. Transparent materials like glass are not easy to cut because they tend to absorb very little energy from the laser.
Some plastics may emit toxic fumes when laser cut, posing a health risk. Additionally, materials with uneven surfaces or that melt easily, such as certain types of rubber or soft foam, may not produce clean and precise cuts. Highly flammable materials can be hazardous due to the heat generated during the process. Understanding the properties of each material is critical to successful laser cutting, and alternative methods may be better suited for some challenging materials.