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  SOFTWOOD:
SPRUCE
 
NAMES: Pine/Spruce
BOTANICAL NAME: Picea abies Karst.
ORIGIN AND SPREAD: Central-, South-eastern- and North-eastern Europe; wide artificial spread.
MACROSCOPIC CHARACTERISTIC FEATURES: Clear boarder of annual rings, yellowish white to reddish white colour, Transition from spring-wood to summer-wood within one year continuously
MICROSCOPIC CHARACTERISTIC FEATURES: Arrangement of the thracheids strictly radial , length of the tracheide up to 43 lumen diameter of spring wood up to 45, by summer wood up to 22, woodrays heterozellular irregular, horizontal and axial pitch streak

IMPORTANT TECHNOLOGICAL FEATURES:

Dry density (grams/cbm) 0,30 0,43 0,64
Volume shrinking tolerance (in %) 11,6 12,0
Pressure strength (Newton/qm) 33 50 79
Bending strength (Newton/qm) 49 78 136
Tensile strength (Newton/qm) 21 90 240
E-Module 7 300 11 000 21 000

PROCESS AND USE:

Easy to saw, to plane, to peel and nailing, gut to stain, drying without problems, no tendency to tear and warp, difficult to impregnate

Usage as construction wood for inside and outside; Important raw material for the paper and pulp industry as well as for the fibre- and chipboard industry.

Poor natural durability

SPECIFIC CHARACTERISTICS:

Special wood for music instruments (resonance wood)

Approx. 50 Picea kinds are known.