[rplnt]

My "cardboard" furniture has solid blocks where screws go. Not wood, but some sort of plywood or something.

I have an ikea bed and rack that is made from wood. Lots of their furniture is regular wood. The cheap ones usually untreated.

[jacquesm]

It's called MDF. You can think of it as high density cardboard, it's mostly wood fibers and resin.