The tannic acid in White Oak protects the wood from fungi and insects. Another factor, which differentiates White Oak from Red Oak is the high amount of tannic acid contained in White Oak. In a straight or rift grain piece of Red Oak you can actually suck water through the pores, whereas a straight or rift grain piece of White Oak will not allow water to pass through. One of the interesting features of White Oak is that its pores contain a substance called tyloses, which prevents water from seeping through the wood. White Oak has a white to light tan sapwood with a tan to brown colored heartwood. We have found this White Oak to have the best combination of color and length. The Appalachian White Oak used by MAR-K is primarily harvested from Eastern Kentucky. This is a "Specialty" wood that MAR-K keeps in stock and the turnaround time is about a week. Walnut is used in the manufacture of architectural millwork, fine furniture, upper end cabinetry, and gunstocks. These rules take into consideration the uniqueness and availability of the resource. Walnut is graded under a special set of rules developed by the National Hardwood Lumber Association. The steaming process is used in Walnut production to darken the sapwood and lessen the distinction between the heartwood and sapwood. The Walnut stocked by MAR-K is steamed immediately after being cut. The sapwood in Walnut is a white to very light gray color, while the heartwood varies from a light brown to almost black color. Anything made of Walnut has the connotation of being of the highest quality. Walnut has been viewed as the ultimate hardwood in the past. The Walnut used by MAR-K is primarily harvested from Missouri, Iowa, and Indiana. Walnut is found throughout the United States, but its commercial harvesting range is confined to the Midwestern States. This is a custom wood that MAR-K keeps in stock and the turnaround time is about a week. The Pennsylvania Cherry does the best job of matching Cherry plywood in color. Cherry is used in fine architectural millwork, upper-end kitchen cabinetry, and fine quality furniture. Cherry is recognized as one of the finest working hardwoods available. Another factor in the increase in cost and decrease in quality has been the restrictions placed on logging in the Allegheny National Forest. This has been caused by the use of the high quality logs for veneering leaving a lesser quality log available for sawing into lumber. Along with the increase in demand for fine cherry lumber we have seen a steady erosion in the quality of lumber available. Cherry has become extremely popular over the past couple years and has shown a marked increase in cost. In the grading of Cherry lumber there are no requirements as to the percentage of heartwood and sapwood. The sapwood is a white color, somewhat distinct from the heartwood. The Cherry from the Pennsylvania region has a pink to light pink heartwood with very little if any gum pockets. Pennsylvania Cherry is the finest Cherry available in the world due to the unique growing environment.
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