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HARDWOOD
EUROPE:
ALDER
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| NAMES: |
Alder |
| BOTANICAL NAME: |
Alnus glutinosa
Gaertn. |
| ORIGIN AND SPREAD: |
Europe, Northern
Africa; Northern boarder 63 – 65 °N |
| MACROSCOPIC CHARACTERISTIC
FEATURES: |
After chopping
when air comes to wood, wood is orange-red, then it turns to reddish-white,
getting darker; not very decorative; boarder of annual rings and
---- clearly visible |
|
IMPORTANT TECHNOLOGICAL FEATURES:
|
Dry density (grams/cbm) 0,45
– 0,51 – 0,60
Volume shrinking tolerance (in %) 12,6 – 14,2
Pressure strength (Newton/qm) 31 – 55 – 77
Bending strength (Newton/qm) 44 – 97 – 170
Tensile strength (Newton/qm) 55 – 84 – 170
E-Module 7 700 – 11 600 |
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PROCESS
AND USE:
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Good to slice and peel; no great
tendency to tear; good to stain and varnish; poor natural durability;
Sliced- and peeled logs for face
veneer; chip-, fibre- and paper industry
Joineries, toys, music instruments;
for turning and carving |
| SPECIFIC
CHARACTERISTICS: |
for the veneer industry
Approx. 30 Alnus kinds are known
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