Veneer Face Flatness(unit mm) Normal Thickness Distance of any point on the upper surface of the veneer that deviates from the light weight straight ruler Veneer length 500 Veneer length 1000 ≤15 2.0 4.0 ＞15..≤25 1.5 3.0 ＞25..≤60 1.0 2.0 ＞60 1.0 1.5 Appearance Quality Item Allowed Range Swelling Not Allowed Cracking Dead Knot Foreign-body Adhering Insect Hole Rot Contamination Bruising A few allowed, not effect in usage Impression Color-odds and splash Patches per sq.m on surface ≤3   GB Test Item--- Before delivery Factory inspection Test Item  Unit Standard Test Method Vertical Bending Strength Toward A Mpa ≥65 GB/T2634—2008 Test Standard Toward B ≥65 Vertical Bending modulus of elasticity Toward A Gpa ≥8 Toward B ≥8 Compressibility (under 20MPa) Toward C % ≤3 Crev ≥70 Impact strength (side test) Toward A KJ/㎡ ≥13 Toward B ≥13 Interlaminar shear strength Mpa ≥8 Vertical electric strength (90 ℃ + 2 ℃) KV/mm ≥11 Vertical electric strength (90 ℃ + 2 ℃) KV ≥50 Performance density g/cm³ >1.1~1.2 water content % ≤6 Shrinkage after drying Toward A % ≤0.3 Toward B ≤0.3 Toward thickness ≤3 Oil absorption % ≥8