2023-01-11 16:56:34
2022-09-06 10:34:35
2022-09-06 10:30:49
2023-02-15 10:13:32
No. | Item | A grade | B grade | C grade | D grade | E grade |
01 | Grain | Regular straight grain, mountain grain | Regular straight grain, mountain grain, half straight grain |
Straight grain, mountain grain, half straight grain |
Straight grain, mountain grain, messy grain |
No limited |
02 | Live knots |
φ≤8mm, 2pcs, color natural |
φ≤15mm, 2-5pcs, color natural |
φ≤60mm, spitting, color closely |
Allowed, width≤ 1/3 width of flooring |
Allowed, width≤ 1/3 width of flooring |
03 |
Dead knots | Not allowed |
φ≤5mm, 1-2pcs, spitting, color closely |
φ≤20mm, 1-3pcs, spitting, color closely |
φ≤40mm, 2-4pcs, spitting, color closely |
φ≤60mm, spitting, color closely |
04 | Pin knots | Single spitting, overall color closely | Small, spitting, color closely allowed | Spitting, color closely allowed |
Spitting, color closely allowed |
Spitting, color closely allowed |
05 | Side knots | Not allowed | Not allowed | Allowed no drop, no cracking, not allowed dead knots |
Allowed no drop, no cracking, not allowed dead knots |
Allowed no drop, no cracking, not allowed dead knots |
06 | Holes | Not allowed |
φ≤1mm, 3-5pcs, spitting, not color changed |
φ≤1mm, spitting, not color changed |
φ≤1mm, spitting, not color changed |
φ≤1mm, spitting, not color changed |
07 | Black Lines | Not allowed |
Not allowed |
1*100mm, 1-3lines, spitting | 3*200mm, 3-5lines, spittng |
3*200mm, 3-5lines, spittng |
08 | Pollution | if the surface can be sanded allowed, oil not allowed |
if the surface can be sanded allowed, oil not allowed |
if the surface can be sanded allowed, oil not allowed |
if the surface can be sanded allowed, oil not allowed |
if the surface can be sanded allowed, oil not allowed |
09 | Splits | Not allowed |
Not allowed |
3*300mm, 1-2lines, seams not allowed |
5*300mm, 1-2lines, seams not allowed |
8*600mm, 1-3lines, seams not allowed |
10 | End Oxidation | Not allowed |
Not allowed |
Allowed a slight, but the color closely | Allowed color closely, but the width≤1/4 of flooring width, sq.m≤5% |
Allowed color closely, but the width≤1/4 of flooring width, sq.m≤5% |
11 | Sub wood | Not allowed | Allowed a slight | Allow only one side, the width≤15% of flooring width |
Allow only one side, the width≤20% of flooring width |
Allow only one side, the width≤30% of flooring width |
12 | color difference | Not allowed | Allowed a slight | Coordination allowed |
Coordination allowed |
Coordination allowed |
13 | Discoloration | Not allowed |
Not allowed |
Allowed slight natural discoloration, not allowed blue/yellow stained fungus |
Allowed slight natural discoloration, not allowed blue/yellow stained fungus |
Allowed slight natural discoloration, not allowed blue/yellow stained fungus |
14 | Bark Pocket | Not allowed |
Not allowed |
2*30mm, 1 line | 4*40mm, 3 lines | 5*60mm, 3 lines |
15 | Watermark, spacer mark | Not allowed |
Not allowed |
Not allowed |
Not allowed |
Not allowed |
16 | Decay | Not allowed |
Not allowed |
Not allowed |
Not allowed |
Not allowed |
17 |
Broken grain |
Not allowed |
Not allowed |
Not allowed |
Not allowed |
Not allowed |
18 | Tabby grain | Not allowed |
Not allowed |
Allowed strip, not allowed flake |
Allowed strip, not allowed flake |
Allowed strip, not allowed flake |
|
Usually is ABCD Grade, 15-20% AB grade, 80-85% CD grade; If the grade is ABCDE, should have 20% C grade. |