The hardened center of wood is called the heartwood. It is usually darker and denser than the surrounding sapwood, and it provides structural support to the tree.
There is no way to harden the wood of a Tulip Poplar tree as it grows. Wood cannot be hardened until after it is harvested, at the time of harvesting and cutting, it may be treated with chemicals or sealants that make the wood stronger.
A flat piece of wood is called a board.
This is known as amber.
A piece of wood siding is called a clapboard or a plank.
The center region is called the eye.
The hardened layer of lava is called "igneous rock".
A hardened layer of magma is called a lava flow or volcanic rock.
Rocks formed from hot molten rock that has coold and hardened are called what?
Thombosis
There are reports from people stating that the use of WD-40 can help to remove the hardened wood stain from metal cranks on a window. It is best to never use anything that could rust or cause damage.
batholiths
Calcification
The darker wood in the center of a tree trunk is called the heartwood. It is made up of older xylem cells that have become inactive and no longer conduct water, but provide structural support to the tree.
The web address of the Wood Turning Center is: http://www.woodturningcenter.org
Basalt
The phone number of the Wood Turning Center is: 215-923-8000.
Man made wood are called engineered wood or composite wood,