Filed Under (6.Knowledge) by Mason Pan on September-6-2008

APA-The Engineered Wood Association is a nonprofit trade association focusing on helping the industry create structural wood products of exceptional strength, versatility and reliability . APA’s PS1-95 is an important standard for Construction and Industrial Plywood .

According to PS1-95, the grades of face/back veneers of plywood are classified as the following (*the following is not the full grade description and is only the simple explanation to the grades of plywood face/back veneers) :

Grade N : the premium grade for natural finish; free of open defects ( knotholes, holes, voids and so on ) ; no more than 6 neatly made repairs of wood are allowed .

Grade A : the high grade suitable for painting; free of open defects ( knotholes, holes, voids and so on ) ; no more than 18 neatly made repairs of wood or synthetic patching material are allowed .

Grade B : a few small defects as the following are allowed: minor sanding and patching defects; small worm or borer holes; small splits, neatly made repairs of wood or synthetic patching material; discoloration .

Grade C Plugged : a few normal size (6.4mm by 12.7mm) open defects (such as knotholes, worm or borer holes and so on) are allowed; repairs, patches and discoloration are allowed .

Grade C : a limited number of big size (not exceed 25mm measured across the grain) open defects like knotholes, worm or borer holes are allowed; other defects such as repairs, patches and discoloration are allowed to a limited extent .

Grade D : a limited number of large size (not exceed 65mm across the grain) open defects like knotholes, worm or borer holes are allowed; other defects such as repairs, patches and discoloration are allowed .

Please note:
*The above mentioned simple explanation to the veneer grades is only for helping understand the grades in plywood standard .
*The above mentioned explanation is not the full description of the plywood grades and can not be used as the plywood standard for production and business . Only the full Grade Description of Veneers in APA PS1-95 can be used for your production and business .
*Want to know more about APA PS1-95, please visit the website: APA-The Engineered Wood Association

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Comments:
An****** on September 27th, 2008 at 7:47 pm #

Who can tell me the difference between B grade and BB grade!
Thank you for your information.

Mason Pan on September 28th, 2008 at 7:49 am #

1.Your mentioned B grade and BB grade are not from APA PS1-95 plywood standard .

2.B grade is better than BB grade . Because a few small knots are allowed in BB grade . However, in practice, people usually use B grade veneers as BB grade veneers .

Kap****** on October 3rd, 2008 at 9:30 pm #

please send price list following requirement
Film Faced plywood with poplar core,
WBP glue Black Film,
15MM

hem****** on October 9th, 2008 at 6:15 pm #

Hi!kip
we are expertised in manufacturing and exporting kinds of plywoods!

Du****** on May 16th, 2012 at 9:37 am #

Where can I buy some Grade N?

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