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We had the good fortune at PRT to recently acquire a 900-1
We offer 3 grades with ranges of color variegation and figure
good color
the boards are classified into various groupings
The boards are then resawn into bookmatched sets and graded into one of three traditional grades
Sitka Spruce - Sonically Graded Size:Classic We had the good fortuneSonic grading is fundamentally different from traditional grading because the process relies on data and mathematical models to classify each board, this helps us to be much more accurate than what eyes only grading can do. By evaluating density, stiffness, Q (damping) and several other factors, the boards are classified into various groupings. Every sonically graded board is required to meet the following specifications: Density in the range of 350
