Quality of the surface
We recommend using Grade C in case a final product is being toned, or if a customer wishes to put emphasis on natural solid board, originality and uniqueness of furniture or other products.
STANDARD REQUIREMENTS FOR THE QUALITY OF FJEG PANELS
|
Category |
Surface A |
Surface B |
Surface C |
|
Surface appearance and wood color |
Uniform appearance and color, only small deviations of wood tone are allowed |
Strict color matching is not required, differing areas are allowed |
Strict color matching is not required, differing areas are allowed |
|
Wood grain |
Regular grain only |
Irregular grain is allowed |
Irregular grain is allowed |
|
Sound ingrown knots |
Single knots are acceptable in diameter up to 5mm |
Allowed in diameter up to 10 mm spaced evenly on the surface |
Allowed in diameter up to 30 mm spaced evenly on the surface |
|
Pin knots (diameter up to 3 mm) |
Single pin knots are allowed |
Allowed |
Allowed |
|
Black knots, partially ingrown and open knots |
Not allowed |
Allowed single in diameter up to 5 mm |
Allowed in diameter up to 15 mm |
|
False heartwood |
Not allowed |
Single strips or areas of light-toned false heartwood are allowed |
Allowed without limitation |
|
Dried water streaks |
Not allowed |
Firm light-toned streaks in size up to 5x50mm are allowed |
Allowed |
|
Mineral srteaks |
Insignificant amount is allowed |
Allowed |
Allowed |
|
Nonthrough cracks or checks |
Not allowed |
Fine nonthrough checks in length up to 50 mm are allowed |
Fine nonthrough checks in length up to 50 mm are allowed |
|
Ingrown bark |
Not allowed |
Not allowed |
Allowed |
|
Decay, mould,wormholes |
Not allowed |
Not allowed |
Not allowed |
|
Sanding defects |
Not allowed |
Not allowed |
Allowed single areas in length up to 50 mm |
|
Fractures, tore-outs and other processing defects |
Not allowed |
Not allowed |
Single allowed |
|
Panel repair |
Not allowed |
3 repairs allowed only |
Allowed |
|
Gluing quality |
Visible glue joints are not allowed |
Thickness of the glue joints must not exceed 0,2 mm |
Visible glue joints are allowed |
Other grades:
Finger jointed edge glued panels of grade A/B are used for production of furniture, stairs, their components, interior components and other products, for which quality of the sureface plays an important role. Birch FJEG panels of grade A/B can be easily processed and toned as other tree species.
Birch FJEG panels are made of ecologically pure solid birch wood. Traditionally, panels of grade C/C are used for production of furniture, stairs, their components, interior components and other products, for which it is important to emphasize naturally of the material. These panels can be easily processed.
