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

Decaymould,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.