The Factors Affecting the Quality of the Lumber and Veneer
CLASSIFICATION AND PROPERTIES,
CLASSIFICATION
1- CLASSES
I. Class, II. Class, III. Class
Veneers are classified into three categories as follows according to the visible properties;
KVeneers are classified into three categories as follows according to the part of the tree they are produced;
Trunk-Stub, Root, Gall
2-TYPES
3-CATEGORIES
Rift Cut (Straight Line), Crown (Figured), Mixed Crown (Mix Figured)
PROPERTIES
Veneers are classified into three categories as follows according to the type of procurement from wooden prism;
1- APPERANCE
The visual properties of the veneer should comply with Diagram-1
Diagram-1
| DEFECTS | CLASSES | ||
| I. | II. | III. | |
| COLOR DIFFERENCE | NOT AVAILABLE | NOT AVAILABLE | COULD BE AVAILABLE |
| COLORING | NOT AVAILABLE | NOT AVAILABLE | Could be available up to 20% of the area. |
| ROTTEN | NOT AVAILABLE | NOT AVAILABLE | NOT AVAILABLE |
| KNOT (in each meter square) | There could be two point knots | There could be four point knots and/or two fused knots. Removed knot is not available | There could be point knots, there could be 4 small fused knots and/or two removed knots |
| CRACK | There could be cracks at the length of max. | ||
| %5'i | %10'u | %20'si | |
| of the length of the veneer provided that they are located exactly side by side | |||
| CURVATURE OF THE FIBER | MAX. %3 | MAX. %6 | MAX. %12 |
| WAVINESS OF THE FIBER | NOT AVAILABLE | NOT AVAILABLE | COULD BE AVAILABLE |
| ARE THE HOLES MADE BY INSECTS | NOT AVAILABLE | NOT AVAILABLE | 4 SMALL HOLES MADE BY INSECTS COULD BE AVAILABLE AT EACH METER SQUARE. BIG HOLES MADE BY INSECTS IS NOT AVAILABLE |
| EMBEDDED BARK | NOT AVAILABLE | NOT AVAILABLE | COULD BE AVAILABLE |
| RESIN POUCH | NOT AVAILABLE | NOT AVAILABLE | COULD BE AVAILABLE |
| WOUNDS | NOT AVAILABLE | NOT AVAILABLE | NOT AVAILABLE |
| STAINS FOREIGN MATERIALS | NOT AVAILABLE | NOT AVAILABLE | COULD BE AVAILABLE |
| OXIDIZING | NOT AVAILABLE | NOT AVAILABLE | COULD BE AVAILABLE |
| TRACE OF KNIFE OR PRESSURE PLATE | NOT AVAILABLE | THE VENEERS WHICH HAVE DECORATIVE VIEW WITH GALL AND BURL VENEERS ARE AVAILABLE . COULD BE AVAILABLE |
COULD BE AVAILABLE |
2- PRODUCTION PROPERTIES
The surface of the veneer should be uniform and they should have homogeneous thickness and there should be no rupture and squash.
3- MOISTURE
Moisture of the veneer should be %8 + %3
DIMENSION AND TOLERANCES
1- DIMENSIONS
The width and length of the veneers obtained from the trunk and stub of the tree are free. These veneers should be rectangular and the deviation of the length of the edges intersecting at right angle should be less than 2 mm for 100 cm.
The width, length and shape of the veneers obtained from the burl and root are free. The width, length and thickness of the veneers in the veneer package should be same.
2- TOLERANCES
Dimension and tolerances of the veneers should comply with Diagram-2
Diagram-2
DIMENSIONS |
TOLERANCES
(will be in mm according to nominal DIMENSIONS |
|
LENGTH
WIDTH |
FREE
FREE |
-5
-2 |
Thickness (mm) |
<1
1,1-4
4,1-6 |
+-0,06
+-0,1
+-0,2 |
INSPECTION OF THE PROPERTY
The article notes of the properties and inspections foreseen in that standard are available in Diagram-3.
Diagram-3
ITEM NO |
PROPERTY |
ARTICLE NO. |
INSPECTION ARTICLE NO. |
1 |
VIEW |
1.2.1 |
2.2.1 |
2 |
PRODUCTION |
1.2.2 |
2.2.1 - 2.2.2 |
3 |
HUMIDITY |
1.2.3 |
2.2.3 |
4 |
DIMENSIONS AND TOLERANCES |
1.3 |
2.2.2 |
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