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Kappa number
	A test for the degree of lignification of pulps.
KD
	Kiln-dry wood.  Dried in a kiln with the use of artificial heat to a specified moisture content.
Kerf
	1.  Width of the cut made by a saw blade. 2.  The width of the saw tooth at its outermost widest point.
Key
	A small, parallel-sided piece, flat or tapered on top, for securing pulleys and other parts to shafts.
Keyway
	A groove or channel for a key, as in a shaft or the hub of a pulley; a keyseat.
Kiln
	A chamber having controlled airflow, temperature, and relative humidity for drying lumber, veneer, and other wood products.
Kiln carts, trucks
	A framework equipped with wheels that supports a load of lumber for kiln drying.  Used in track kilns.  Trucks also refer to the wheel assemblies alone.
Kiln kink
	The distortion in lumber that results from the uneven forces applied by misplaced truck supports and crossouts.  Once dried into the lumber their effect is permanent.
Kiln-dry wood
	Dried in a kiln with the use of artificial heat to a specified moisture content.
Kiln-drying schedule
	A stipulated set of dry- and wet-bulb temperatures and air velocities employed in drying a kiln charge of lumber or other wood products.
Kilns, direct-fired
	Dry kilns that are heated with combustion air (gas or wood fired).
Kilns, package
	A trackless compartment kiln for drying packages of stickered lumber.  It has large doors through which a forklift loads lumber directly within the kiln.
Kilns, steam
	Kilns heated by steam.
Kilns, track
	Kilns loaded by placing lumber on kiln trucks that run on tracks within the kiln.  These can be single- or double-tracked kilns.
Kilogram (kg)
	The basic unit of mass in the SI system, equal to 1,000 grams (approximately 2.2 lbs). View:   Metric / Imperial Conversion
Kilometre (km)
	A measure of length equal to 1,000 metres or 0.62 miles. View:   Metric / Imperial Conversion
Kinetic energy
	Energy that a substance or body has by virtue of its mass (weight) and velocity.
Knee
	The part of a sawmill carriage headblock that bears the carriage dogs, which hold the log being sawed.  It also supports the levers used to operate both the carriage dogs and the taper set.
Knife marks
	The number of knife marks per inch created by a planer head. View:   Knife Mark Calculator
Knot
	That portion of a branch or limb that has been surrounded by subsequent growth of the stem.  The shape of the knot as it appears on a cut surface depends on the angle of the cut relative to the long axis of the knot. View:   Knots
Knot, encased
	The rings of annual growth are not intergrown with those of the surrounding wood. View:   Encased Knot
Knot, intergrown
	The rings of annual growth are completely intergrown with those of the surrounding wood. View:   Intergrown Knot
Knot, loose
	Is not held firmly in place by growth or position and cannot be relied on to remain in place. View:   Loose Knot
Knot, open
	Opening produced when a portion of a knot has dropped out or separated due to seasoning.
Knot, pin
	Is not more than ½ inch in diameter.
Knot, sound
	Is solid across its face, at least as hard as the surrounding wood, and shows no indication of decay. View:   Sound Knot / Tight Knot
Knot, spike
	Is cut approximately parallel to its long axis so that the exposed section is definitely elongated. View:   Spike Knot
Knothole
	Opening produced when knots drop from the wood in which they were once embedded. View:   Knot Hole
Knuckleboom
	A hydraulically operated loading boom whose mechanical action imitates the human arm. Common on "forwarders".
Kraft (sulfate) process
	A chemical pulping process in which lignin is dissolved by a solution of sodium hydroxide and sodium sulfide.
Kraft paper
	Heavy brown paper sometimes treated to be water repellant.
Kraft pulp
	A chemical wood pulp obtained by cooking wood chips at a high temperature in a solution of sodium hydroxide and sodium sulfide.