Black Walnut Fancy Plywood Quality Standard |
Defects |
A |
B |
C |
Sapwood |
No |
No |
Yes |
Heartwood |
Slight |
Slight |
Yes |
Color Streaks or Spots |
Slight |
Slight |
Yes |
Color Variation |
No |
Slight |
Slight |
Sharp Color Contrasts at Joints |
Not allowed |
Not allowed |
Yes |
Matching |
Book Matched
Slip Matched
Pleasing Matched |
Yes
Specify
-- |
Specify
Specify
Yes |
--
--
-- |
Min. Nominal
Width of Face
Components |
Plain-S
Quarter
Rotary |
127 mm
76 mm
127 mm |
76 mm
76 mm
102 mm |
No limit |
Small Conspicuous Burls & Pin Knots-Combined Avg. No. |
8 per 1 m2 |
22 per 1 m2 |
No limit |
Conspicuous Burls-Max. Size |
9.5 mm |
12.7 mm |
No limit |
Conspicuous Pin Knots-Avg.
No.
Dark Part-Max. Dia.
Knots-Max. Dia. |
6 per 1 m2
3.2 mm
6.4 mm |
11 per 1 m2
3.2 mm
6.4 mm |
No limit |
Scattered Sound & Repaired Knots-Combined Avg. No.
Max. Dia.-Sound
Max. Dia.-Repaired
Avg. No.-Repaired |
No |
4 per 3 m2
9.5 mm
3.2 mm
4 per 3 m2 |
3 per 1 m2
12.7 mm
12.7 mm
4 per 3 m2 |
Mineral Streaks |
Slight |
Yes |
Yes |
Bark Pockets |
Less |
Max. no. 6
Max. area
3.2 x 25.4 mm |
Max. no. 6
Max. area
6.4 x 50.8 mm |
Worm Tracks |
No |
Slight |
Slight |
Vine Marks |
Occasional |
Yes |
Yes |
Cross Bars |
Occasional |
Yes |
Yes |
Rough Cut / Ruptured Grain |
No |
Slight |
Slight |
Blended Repaired Tapering
Hairline Splits |
Max. no. 2
Max. area 1 x
152
mm |
Max. no. 4
Max. area 3.2 x
203
mm |
Max. no. 4
Max. area 4.8 x
203
mm |
Repairs |
Small Blending |
Blending |
Blending |
· Unfilled wormholes, open splits, open joints, open bark pockets, or doze not allowed in above grades.
· Sap allowed in rotary in grades A and B; however, the percentage must be agreed upon between buyer and seller.
· Outside components will be a different size to allow for edge trim loss and certain types of matching.
·
For Black Walnut, conspicuous pin knots means sound knots 6.4 mm or less in diameter with dark centers larger than 1.6 mm. Blending pin knots 6.4 mm or less in diameter with dark centers of 1.6 mm or less are allowed in all grades of Black Walnut. |