MDF-XPLY weighs 30% less than traditional PB/MDF but is stronger, the company says; it is also available in a solid
lumber core center lightweight panel.
Therefore, MC = 20% was used as the wet-limit for which it can be assumed that the
lumber core is below FSP.
MDF-XPLY is also available in a solid
lumber core center lightweight panel.
In 1963 veneered table tops were normally constructed using hardwood plywood with a
lumber core; by the 1980s particleboard and other composite substrates had replaced lumber.
Lumber core, MDF and flake cores also are available in select popular sizes.
manufacturers in the early 1950s as a replacement for
lumber core in plywood manufacture.
Davis began selling glued-up, planed
lumber core in 1949.
Again, I see no reason for
lumber core in your case.
Substrates: PB, MDF & stave
lumber core Circle #309
This way, the veneer layers effectively restrain the
lumber core because of:
"Highly figured burls and fancy face veneers with lot of different grain directions are hard to stabilize applied to a
lumber core. Using particleboard cores adds to the stability of the piece."