Wood Species - Heart Pine
ANTIQUE HEART PINE
Slow-growth longleaf pine (Pinus spp.), often recovered from structural
timbers in pre -1900 warehouses and factories, or as sunken logs from river bottoms.
Appearance
Color: Heartwood is yellow after cutting and turns deep pinkish tan to
warm reddish brown within weeks due to high resin content. Sapwood remains yellow,
with occasional blue-black sap stain.
Grain: Dense, with high figuring. Plainsawn is swirled; rift or quartersawn
is primarily pinstriped. Curly or burl grain is rare.
Variations within species and grades: Moderate color variation.
Properties
Hardness (Janka): 1225; 5% softer than Northern red oak.
Dimensional Stability: Above average (change coefficient .00263; 29%
more stable than red oak).
Durability: Natural resistance to insect infestation in heartwood; dense.
Workability
Sawing/Machining: Good machining and hand-tooling qualities.
Sanding: Tendency to clog paper due to high resin content; begin with
coarse grade.
Nailing: Good holding ability.
Finishing: Accepts both surface and penetrating finishes. Some stains
may blotch; raising grain first may help. To reduce the wood’s tendency
to repel finish coats, surface resins may be removed with a solvent that is
compatible with the finish to be used.
From The National Wood Flooring
Association's "Wood Species Used in Wood Flooring" information booklet.
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