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EPA finalized a rule to reduce harmful exposures to formaldehyde emitted into the air from certain composite wood products.This rule implements the formaldehyde emission standards and other provisions required under the Formaldehyde Standards for Composite Wood Products Act, which added Title VI to the Toxic Substances Control Act (TSCA).In any of the veneer-slicing methods, when the veneer is sliced, a distortion of the grain occurs.As it hits the wood, the knife blade creates a "loose" side where the cells have been opened up by the blade, and a "tight" side.While a log used for solid lumber is cut into thick pieces, usually no thinner than 1/8 of an inch (3 mm), veneers are cut as thin as 1/40 of an inch (0.6 mm).Depending on the cutting process used by the veneer manufacturer, very little wood is wasted by the saw blade thickness, known as the saw kerf.

By June 1, 2018, and until March 22, 2019, regulated composite wood panels and finished products containing such composite wood panels that are manufactured (in the United States) or imported (into the United States) must be certified as compliant with the TSCA Title VI or the California Air Resources Board (CARB) Airborne Toxic Control Measures (ATCM) Phase II emission standards by a third-party certifier (TPC) approved by CARB and recognized by EPA.The appearance of the grain and figure in wood comes from slicing through the growth rings of a tree and depends upon the angle at which the wood is sliced.There are three main types of veneer-making equipment used commercially: Each slicing processes gives a very distinctive type of grain, depending upon the tree species.Wood veneers are typically sold by the square foot.With the ability to join veneers, even small pieces are usable, resulting in very little waste.

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