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Linyi Guotai wood Co., Ltd.
Address:Yitang,Linyi,Shandong,China
Tel:+86-539-8983000 
Fax:+86-539-8983288
NET:www.chineseplywood.net
E-mail:sales@chineseplywood.net
  Linyi Guotai wood Co., Ltd. >>> Details
JPIC ORDER
from:Huatian wood Co., Ltd.    Published:2009-1-15   Views:2095  Author:

JPIC

PLYWOOD FOR GENERAL USES
Standard of inspection, method of inspection, grades, standards of grades and methods of determining grades.
A.. Grading:
 

 

Item

Quality

a

b

c

d

Knot (pin knot is excluded),bark pocket or pitch pocket

Total number of knot, bark pocket and pitch pocket (Bark pocket and pitch pocket having 1/8 in. or less of maximum diameter are excluded)

Total number shall not exceed a quotient resulted from dividing the surface area in sq.ft. by 5 sq.ft For China, the total number shall not exceed two multiples of above quotient. (If the quotient has any fraction, the quotient shall read as its integer plus ᾿᾿

Total number shall not exceed two multiples of a quotient resulted from dividing the surface area in sq.ft. For China, the total number shall not exceed three multiples of above quotient. (If the quotient has any fraction, the quotient shall read as its integer plus ᾿᾿

Not limited

Not limited

Sound knot

1/2 in. or less of maximum diameter

3/4 in.or less of maximum diameter

2 in. or less of maximum diameter

Not limited

Dead Knot

1/8 in. or less of maximum diameter

1/4 in. or less of maximum diameter

1/2 in. or less of maximum diameter

1᾿/2 in. or less of maximum diameter

Knot Hole

1/8 in. or less of maximum diameter and it shall be mended skillfully

1/4 in. or less of maximum diameter and it shall be mended skillfully

1/2 in. or less of maximum diameter and it shall be mended skillfully

1᾿/2 in. or less of maximum diameter

Bark Pocket or pitch pocket

1/4 in. or less of maximum diameter. Or 1/16 in. or less of width and 3/4 in. or less of length.

1/2 in. or less of maximum diameter. Or 1/8 in. or less of width and 3/4 in. or less of length.

3 in. or less of maximum diameter

Not limited

Bark Pocket or pitch pocket

1/4 in. or less of maximum diameter. Or 1/16 in. or less of width and 3/4 in. or less of length.

1/2 in. or less of maximum diameter. Or 1/8 in. or less of width and 3/4 in. or less of length.

3 in. or less of maximum diameter

Not limited

Pin Knot

It shall not impair visiblely appearance.

It shall not impair visiblely appearance so remarkably

Not Limited

Not Limited

Discoloration

Very Slightly

Slight

Not conspicuous

Not conspicuous

Split

It shall be filled skillfully. 1/32 in. or less of width; and length shall not exceed 5 percent of the piece length

It shall be filled skillfully. 1/16 in. or less of width; and length shall not exceed 10 percent of the piece length

It shall be filled. 1/8 in. or less of width; and length shall not exceed 15 percent of the piece length

1/4 in. or less of width and length shall not exceed 20 percent of the piece length. But the filled one shall not exceed 1/2 in.of width and length of 25 percent of the piece length.

Cross break

None

None

Length shall not exceed 10 percent of the piece width

Length shall not exceed 20 percent of the piece width

Worm hole

1/16 in. or less of maximum diameter. Those shall be mended skillfully and shall not be clustered

1/8 in. or less of maximum diameter. Those shall be mended skillfully and shall not be clustered

1/4 in. or less of maximum diameter. Those shall be mended

3/4 in. or less of maximum diameter. Not limited for the mended ones

False Heartwood (Applicable only to Beech)

Colors shall be well matched

Colors shall be matched

Not Limited

Not Limited

Sound Burl

Very Slight

Slight

Not Conspicuous

Not Limited

Rough cut , Torn grain, Brashness

3 percent or less of the surface area, Very slight

Do

5 percent or less of the surface area, slight

10 percent or less of the surface area, Not conspicuous

Shim

Length shall not exceed 10 percent of the piece length, Colors and grains shall be matched. Gap is not acceptable

Colors and grains shall be matched. Gap is not acceptable

Colors shall be matched. Gap is not acceptable

Not Limited

Joint

Colors and grains shall be matched in conformity to the condition of joint. Gap is not acceptable. Joint running slatendicular shall not be conspicuous

Colors and grains shall be matched in conformity to the condition of joint. Gap shall not exceed 1/64 in. of width and length of 10 percent of the piece length. It shall be mended skillfully. Joint running slatendicular shall be scarcely conspicuous

Colors and grains shall be almost matched in conformity to the condition of joint. Gap shall not exceed 1/32 in. of width. It shall be mended. Joint running slatendicular shall be scarcely conspicuous.

Gap shall not exceed 1/8 in. of width

Blister

None

None

None

None

Wrinkle

None

None

None

Slight

Flaw and depression

None

None

Very slight

Not conspicuous

Hole (worm hole is excluded)

1/16 in. or less of maximum diameter. It shall be mended skillfully

1/8 in. or less of maximum diameter. It shall be mended skillfully

1/4 in. or less of maximum diameter. It shall be mended

1᾿/2 in. or less of maximum diameter.

Finishing

Good Finish

Do

Almost good finish

Do

Insufficient removal of tape

None

Do

Do

Slight

Perforation and other process (Applicable only to the processed plywood)

Good Finish

Do

Do

Not Rough

Finishing of transparent coating which does not obscure the grain or texture.(Applicable only to plywood finished by transparent coating)

Good Finish

Do

Do

 

Other defects

Very slight

Slight

Do

Not limited

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Address:Yitang,Linyi,Shandong,China   Fax:+86-539-8983288
Tel:+86-539-8983000  E-mail:sales@chineseplywood.net 技术支持:临沂信息港
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