The 3.4 mm thick working surface on IG optical breadboards is bonded to a polymeric material that serves to seal the honeycomb core and damp the working surface. The trussed honeycomb is vertically bonded enabling a rigid triple core interface. Although the adhesive is rigid, its broadband damping factor is much higher than that of steel and introduces substantial damping into the core. The side panels are made of a highly damped, epoxy sealed wood composite. Compared to the metal sides used by other breadboard manufacturers, the composite wood sides offer significant damping to the structure and eliminate another source of resonance.

The compliance curve shows the positional motion of the breadboard structure for a given excitation force and frequency. The red is the rigid body line showing how an ideal optical breadboard would perform with no relative motion. The blue line shows the natural frequencies of an IG breadboard and how they deviate from that of a rigid body.