What should be done to the surface of the core material before applying laminate?

The surface of the core material must be smoothened before applying laminate to ensure better adhesion. A smooth surface allows for optimal bonding between the core material and the laminate layers, which is crucial for the structural integrity of the composite. Any irregularities or rough textures can lead to weak spots in the bond, potentially compromising the overall strength and performance of the laminate. Additionally, achieving the correct surface finish can enhance the effectiveness of any adhesives used, making the composite more durable and reliable over time.

In this context, while aesthetics might be a consideration in some applications, it is not the primary concern when preparing the surface for laminate application. Contaminating the surface with resin is counterproductive, as it would interfere with proper bonding rather than enhance it. Lastly, not touching the surface at all can lead to issues with debris or imperfections that could inhibit adhesion. Therefore, smoothing the core surface is essential for achieving a strong, effective laminate bond.