Grades
Grading rules differ according to the country of origin. Most popular standard is the British Standard (BS) and American Standard (ASTM). Joyce (1970), however, list some general indication of grading rules:
| Grade | Description |
|---|---|
| A | Face and back veneers practically free from all defects. |
| A/B | Face veneers practically free from all defects. Reverse veneers with only a few small knots or discolorations. |
| A/BB | Face as A but reverse side permitting jointed veneers, large knots, plugs, etc. |
| B | Both side veneers with only a few small knots or discolorations. |
| B/BB | Face veneers with only a few small knots or discolorations. Reverse side permitting jointed veneers, large knots, plugs, etc. |
| BB | Both sides permitting jointed veneers, large knots, plugs, etc. |
| WG | Guaranteed well glued only. All broken knots plugged. |
| X | Knots, knotholes, cracks, and all other defects permitted. |
JPIC Standards
| Grade | Description |
|---|---|
| BB/CC | Face as BB, back as CC. BB as very little knots of less than 1/4 inches, slight discoloration, no decay, split and wormholes mended skillfully, matched colors, no blister, no wrinkle. Most popular choice for most applications. |
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