Substrate Bonding is the specialized engineering process of fusing an ultra-thin natural marble veneer to a structural support layer. In Modern Engineering, this “interfacial” connection is what transforms a brittle 0.5 mm – 3.0 mm slice of Crystal Calcite (CaCO3) into a high-performance, impact-resistant “technical skin” suitable for aircraft cabinetry, high-rise facades, and luxury yacht interiors.