Honeycomb Laser Cutter Engraver Bed Working Table Prevent Underside Material Burning Charring

I bought this from my 3D printed laser cutter. I wanted a solution to protect material from underside charring and smoke discoloration. These are pretty cheap Amazon
Bed On Amazon
https://www.amazon.com/gp/product/B07D4D1T3K/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B07D4D1T3K&linkId=d27ad07c927a7a35eddc4a1f8c177c09