The fumes the wood is treated with is ammonia vapours. The result is that heartwood gets dark brown and sapwood greyish. The ammonia vapours will form a base, the base will partly be neutralized by the acids, tannins, in the wood, and thereby colouring the wood. The heartwood contains a high amount of tannin and therefore becomes darkest. The process takes from 2 to 20 hours and is comparable to developing films in old times. After fuming I ventilate the wood for a couple of days, then wash the surface in water, dry it, sand it and give it the surface treatment I plan.

Knitting bowl
Knitting bowl
Plate, 7 x 33 cm
Plate, 7 x 33 cm
Symmetry
Symmetry
As a trunk
As a trunk
Wings
Wings
Yin-yang, 4 x 7 cm
Yin-yang, 4 x 7 cm

The Woodturner on Kronens Hede in National Park Thy

Ernst Kempf - Kronens hede vej 12, 7700 Thisted

tlf: 45 97974242 - mobil: 45 60644242 - mail: trae@kronens-hede.dk - cvr. nr. DK12069588