The higher the grade, the better quality you should expect. Particleboard core is the least expensive option. Like MDF core, ...
The Family Handyman on MSN1d
9 Alternative Uses for Sawdust
You can usually find a pile of sawdust under it, even if it’s only used occasionally. If a shop has a belt sander or band saw, there’s probably another pile of finer sawdust under that. Even people ...