JPIC Grading Standard 1968

10/18/2004

Quality

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Item

Knot, (pin knot is excluded), bark pocket and pitch pocket.

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

Not Limited

Sound Knot

2 in. or less of maximum diameter.

Dead Knot

3/4 in. or less of maximum diameter.

Knot Hole

1/8 in. or less of maximum diameter. But the mended one shall not exceed 1/2 in. of maximum diameter.

1/4" or less of MAX dia. But the mended one shall not exceed 1/2" of maximum diameter.

1?in. or less of maximum diameter.

Bark pocket and pitch pocket

1?in. or less of maximum diameter.

Not more than 3" in maximum diameter.

Not Limited

Pin Knot

Not Limited

Discoloration

Not Conspicuous

Permitted

Not Limited

Stain

Not Conspicuous

Decay

None

Very Slight

Split

It shall not exceed 1/16 in. of width and length of 10 per cent of the piece length. But the filled one shall not exceed 1/8" of width and length of 15 percent of the piece length.

It shall not exceed 1/8 in. in width and 12" or less in length. But filled splits of 1/4" or less in width and length 18" or less are permissible.

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

Cross Break

Length shall not exceed 10 percent of the piece length.

Length shall not exceed 20% of the width.

Length shall not exceed 30 percent of the piece length.

Worm Hole

I. 1/16" or less of maximum diameter. Those shall not be clustered, so remarkably.

I. 1/16" or less of maximum dia. and not clustered.

Not Conspicuous

II. Linear worm hole shall not exceed 5/8" of length, but shall be mended.

II. Linear worm hole shall not exceed 1 inch of length and shall be mended. Total number shall not exceed 1 per sq.ft.

Total number shall not exceed a quotient resulted from dividing the surface area in sq.ft. by 5 sq.ft.

(If the quotient has any fraction, the quotient shall read as its integer plus "1".)

Presence of Sapwood and heartwood on the surface.

Not Limited

Sound burl, vine streak, cross bar.

Not Conspicuous

Not Limited

Rough cut Torn grain Brashness.

10 percent or less of the surface area. Not conspicuous.

15% or less of the surface area. Not conspicuous.

Not Conspicuous

Shim

Color shall be matched. Gap is not acceptable.

Not Limited

Joint

Color shall be almost matched. Gap of joint shall not exceed 1/32" of width and it shall be mended.

Gap of joint shall not exceed 1/8 in. of width.

Blister

None

Wrinkle

None

Slight

Hole (Worm hole excluded)

3/8" or less of maximum diameter. It shall be mended.

1/2" or less of maximum diameter. It shall be mended.

1?or less of maximum diameter.

Finishing

Almost good finish

Not rough

Insufficient removal of tape

None

Not Conspicuous

Slight

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

Not rough

Finishing of transparent costing which does not obscure the grain or texture.

Press Mark

Max 3mm x 100mm 2 per panel, it shall be mended.

1. Same direction of grain max 12.7 mm x 200mm, it shall be mended.

Permitted if not affect face quality.

2. Cross direction of grain max 6mm x 100mm. It shall be mended.

3. Small press mark it shall be mended.

Core Overlap

Slight

Core Uneven Thickness

None

Not Conspicuous

Core Void

It shall not affect the surface core void at the edge shall not exceed 3mm of width.

It affect the surface slightly. core void at the edge shall not exceed 4mm of width.