Brochure | Contact Us | How to Order | Client Referrals   
Home About Us Products Quality Assurance Certifications
        
 
  
Quality Assurance
  
Overview
 
Quality Standards
  
Natural Wood Panels
 
Engineered Wood
 
Edge Bands
 
Inspection Procedures
 
Production Procedures
 
  
  
  
Brochure
  
PDF download

You need Adobe Acrobat Reader to view this PDF file.
 
 
Home > Quality Standards > Commercial Plywood
  
  
  
  Plywood   Block Board   Particle Board   3 Ply Shuttering Panels
Fancy Plywood: Oak | Beech | Maple | Cherry | Teak | Black Walnut
Commercial Plywood: Commercial Plywood
Industrial Plywood: Industrial Plywood
Pine Plywood: Pine Plywood
Film Faced Plywood: Film Faced Plywood
Hpl Plywood: Hpl Plywood
  

Commercial Plywood Quality Standard

Defects

Unit

Face

Back

 

 

BB/BB
Grade

BB/CC
Grade

BB/BB
Grade

BB/CC
Grade

Pin Knots

Allowed

Live knots

Max. dia. (mm)

19

25

19

30

Max. no. per m2

2

3

2

5

Half-Live knots; Dead Knots (no fall off); Inbarks Altogether

Max. no. per m2

Not allowed

2

Not allowed

4

Half Live knots

Max. dia. (mm)

Not allowed

10

Not allowed

No limit

Dead Knots
(no fall off)

Max. dia. (mm)

Not allowed

4

Not allowed

20

Inbarks

Max. dia. (mm)

Not allowed

15

Not allowed

20

Closed Splits

Max. area (mm)
(% of total surface)

Not allowed

Not allowed

Not allowed

2 x 300
permitted;
repaired
with similar
color putty

Insect Holes

Max. dia.(mm)

Not allowed

2

Not allowed

Max. no. 4
Max. dia. 2 mm

Max.no. per m2

4

No limit

Face Contamination

Max. area
(% of total surface)

Not allowed

Not allowed

Not allowed

0.5

Discoloration

Max. area
(% of total surface)

Not allowed

5

Not allowed

40

Rot

Max. area
(% of total surface)

Not allowed

Veneer Shortage & Damage of Four Corners

Not allowed

Not allowed

Not allowed

Not allowed

Delamination

Not allowed

Blisters

Not allowed

Sand Through

Not allowed

Torn Grain

Max. area
(% of total surface)

Not allowed

Not allowed

Not allowed

5

Excess Sanding

Not allowed

Mending

Max. size per surface

Not allowed

Not allowed

Not allowed

≤ 50 x 100 mm
(boat shape)

Max. no. per surface

3

Core Grade

First grade and second grade mixed
For 3 mm, must be first grade

Core Voids

≤ 3 mm

Overlap & Splits
at the Other Cores

Max. length (mm)

≤ 10

Overlap & Splits
at the Core Adjacent to the Top
& Bottom Veneers

Max. width (mm)

Not allowed

1.5

Not allowed

3

Max. no.

2

3

Core Mending

Mended with wood-wool

Panel Edge

Smooth

Hollowness / Imprints / Bumps

Max. surface (mm2)

Not allowed

20

Not allowed

40

Max. no. per m2

1

1

Max. depth (mm)

0.4

Allowed if there is no breach

Dimensional Tolerances

Item Dimension Tolerance
Thickness (mm) < 9 +/- 0.30
≥ 9 +/- 0.50
Width (mm) 1220 +/- 0.50
Length (mm) 2440 +/- 1
Cross Length (mm)   ≤ 2
Cross Length Warping (mm)   ≤ 4
Length Warping (mm) For plywood with a thickness > 6, warping shall not exceed 1.0% of the length

Physical and Mechanical Properties

Item Plywood Base
Moisture Content (%) 8 - 12
Adherence Test at the Core Maximum separation after boiling and stretching 25 mm
Adhesive Strength of the Veneer (MPa) ≥ 0.50

N.B. Different specifications can be considered

 

 
  
  Copyright © 2012 China Link. All rights reserved.