1 strip Parquet Grading

AB Grade

CD Grade

Sounds(Live) knot

Max Dia.＜5mm, not more than 5 pcs. Or Max Dia.＜8mm not more than 3 pcs. in single board

Allowed

Black( dead) knot

Max Dia.＜2mm, not more than 3 pcs. in single board

Max Dia.＜25mm, not more than 3 pcs. Or Max Dia.＜10mm not more than 8 pcs. in single board

Sapwood

Not more than 10% of width of board, stained to the same color with the board

Not more than 30% of width of board, stained the same color with the board

Color variation

Slight and natural is allow

Allowed

Rot

Not allowed

Not allowed

Bark

Not allowed

Within length 20mm, width? 1mm, not more than 1pcs, repaired

Crack

Not allowed

Not allowed

Heartwood

Not allowed

Allowed,if the heartwood don't change

Pollution on surface

Not allowed

Slightly allowed

Water mark

Not allowed

Not allowed

Sticker mark

Not allowed

Not allowed

Stained by mould fungi

Not allowed

Not allowed

Saw mark

Not allowed

Not allowed

Others

Not allowed

Not allowed