Sorting of qualities

After planing, the products are sorted manually. Despite thorough inspection, elements of other quality class may occur in the any given class, max. 5%. We deliver the planks in both radial and tangential cut. This may influence the dimensional and shape modifications of the floor. The appearance of the wood is unchanging.

Quality A+ (ELEGANCE):

Minor knots
Round puttied knots up to approx. 5 mm, knots of other shapes up to approx. 7,5 mm are permitted
No whitening
No insects and defects caused by planing
Natural colouring and live structural differences are permitted, mineral stripes may occur in small numbers due to natural oxidation

Quality A (SUPERB):

Small open and puttied round knots up to approx. 25 mm are permitted
Small open and puttied knots (up to approx. 30 mm) of other than round shapes are permitted
Encased healthy knots of medium size are permitted
No whitening
No insects and defects caused by planing
Natural colouring and live structural differences, granularities and grains are permitted, mineral stripes may occur in small numbers due to natural oxidation

Quality BA (CLASIC):

The Superb style partially, with larger rustic puttied knots up to +- 40 mm, cross knots and knots of other shapes are permitted up to +- 100 mm
Puttied cracks and encased healthy knots are permitted
Essentially without whitening
No insects and defects caused by planing
Natural colouring and live structural differences are permitted, mineral stripes may occur in small numbers due to natural oxidation

Quality ABC (ORIGINAL):

A mix of 80% Classic and 20% Special rustic
See the description of qualities Classic BA and Special rustic

SPECIAL RUSTIC CLASSIFICATION

Specially classified old-style oak material. Very lively, open, puttied and non-puttied knots, cracks and cross-like knots without size limits, extreme natural colour variations are permitted, whiteness permitted, granularity and different grains permitted, stains occurring as a result of drying permitted, mineral stripes can occur in limited numbers due to natural oxidation.

SPECIAL OLD CLASSIFICATION:

Specially classified old-style oak material. Very lively, open, puttied and non-puttied knots, cracks and cross-like knots without size limits, extreme natural colour variations are permitted, whiteness permitted, granularity and different grains permitted, stains occurring as a result of drying permitted, mineral stripes can occur in limited numbers due to natural oxidation.

SAMPLE BOOK OF PUTTY TONES

In this sample book, you will find specimens of colours for knot cementation; the top line shows surface treatment with Naturel oil.
The bottom line is without surface treatment.
Colours of putties for the respective tones listed in the price list.

SMOKY TONES

Important notice: The may be larger colour variations in smoky tones (smoky white, mildly smoky, cathedral, deeply smoky).

During ammonia fuming, a certain amount of ammoniac is added in the ammoniac chamber to react with the tanning agent contained in the oak. The planks get darker colour in this process. Due to the fact that each plank contains a different amount of tanning agents, it is impossible to guarantee colour uniformity to the customer. Esco Company only uses ammonia fuming on the surface, up to the depth of +- 2 mm. These colour variations – differences in ammonia-fumed floors are not a reason to file claims.

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