Grading Rules

Mukti Board Grading

No :

STD - QC.prod - 001

Tgl Efektif :

Disetujui oleh :

Halaman 1/1

QMR

Revisi : 02

Properties

Test Item

Thick. Range

Unit

A1

A2

B1

1. Average Thickness Tolerance

< 2.5 mm

mm

± 0.15

± 0.25

± 0.35

2.5 mm - 3.0 mm

> 3.0 mm

2. Minimum Average Density

< 2.5 mm

Kg/m 3

820

780

<780

2.5 mm - 3.0 mm

800

760

<760

> 3.0 mm

780

740

<740

3. Modulus of Rupture

< 2.5 mm

N / mm 2

≥28

25-27

<25

2.5 mm - 3.0 mm

≥30

27-29

<27

> 3.0 mm

≥32

29-31

<29

4. Modulus of Elasticity

< 2.5 mm

N / mm 2

≥2500

2500 - 2000

< 2000

2.5 mm - 3.0 mm

> 3.0 mm

5. Internal Bond

< 2.5 mm

N / mm 2

≥0.64

0.60-0.63

<0.6

2.5 mm - 3.0 mm

> 3.0 mm

6. Moisture Content

< 2.5 mm

%

≥4.0

2.5 mm - 3.0 mm

> 3.0 mm

7. Thickness Swelling ( 24 hr )

< 2.5 mm

%

≤ 45.00

45.01 - 50.00

>50.00

2.5 mm - 3.0 mm

> 3.0 mm

7. Surface Absorption

< 2.5 mm

mm

≥150

100 - 150

<100

2.5 mm - 3.0 mm

> 3.0 mm

Appearance

Item

Unit

A1

A2

B1

1. Dimension

Length

mm/m

± 2

± 3

± (>3)

Width

± 2

± 3

± (>3)

Diagonal

± 1.5

± 3

± (>3)

2. Surface Quality

Latex Spot

Amount

spot/m 2

≤ 3

3-5

>5

Diameter

mm

≤ 5

5-10

>10

Fiber Spot

Amount

spot/m 2

≤ 3

3-5

>5

Diameter

mm

≤ 5

5-10

>10

Water Stain

Amount

spot/m 2

≤ 3

3-5

>5

Diameter

mm

≤ 5

5-10

>10

Line

Amount

-

1

2-3

>3

Wide

mm

≤ 20

20-30

>30

Rough Surface

Fine

bit rough

Rough

Tigerline

None

None

Yes

Press Mark

None

Yes

Yes

Uneven Thickness Spot

None

Yes

Yes

Fibre Size

Small

Medium

Big

Chatter Mark

None

Yes

Yes

Blister

None

None

None

Color {Marking : Terang (Wt), Standar(-), Gelap(O)}

-

-

-

2. Side Quality

Broken Edge

None

Yes

Yes

Warping

Height

mm

≤ 30

30-80

>80

Saw Blade Mark

None

Yes

Yes

Note :