The modified tree retains its natural colour but then ages naturally. As wood ages, it will turn grey and eventually gets a silvery grey shade.
The greying of wood occurs due to a number of external factors. Among other things, sunlight degrades the lignin and hemicellulose in the outer wood, causing the wood to bleach. Other factors such as dirt particles, surface deposits and dead wood particles cause the wood to turn grey. The combination of bleaching and greying creates a silvery grey shade.
Depending on the environment in which the wood is placed, ageing occurs at different speeds. Ageing is faster if the wood is subject to the elements and facing south, having the highest exposure to the sun. In pinewood, which consists of heartwood and sapwood, ageing occurs even faster in the sapwood as it absorbs water significantly easier than the heartwood and therefore has a higher moisture content which advances the growth of deposits on the surface.
OrganoWood-modified wood ages naturally which means that greying does not occur evenly throughout the wood. In standard wood, sapwood e.g. greys faster than the heartwood. At an early stage of development, greying may even be spotted, but it evens out relatively quickly. After 1-2 years, a wooden deck placed outside in the sun will have a beautiful surface that is evenly grey.
One effect that may occur on all wood that is placed outside and ages is the so-called chipping ("fibre pile") where fibres come loose from the surface of the wood. This occurs when the lignin which binds the fibres together is degraded by the UV radiation of the sun. The problem especially happens on wood that is placed in environments with intense sun exposure. Chipping can be reduced with surface treatments and proper maintenance.