Does hardened wood change colour over time?

Wooden floors and furniture change colour over time when they are exposed to the UV light found in ex. daylight - so also Hardened Wood and this is not unique to Bjelin but applies to all wooden floors on the market. This process is usually less noticeable in the pigmented floors, although even these change colour over time. The colour shift is not infinite but reaches a maximum point where it finally evens out.