ᐅ Why do the colors of BILLY shelves change when exposed to sunlight?

Billy shelves are not equipped with UV blockers.

Therefore, their color changes when exposed to direct sunlight.

Avoid direct sunlight whenever possible.

Here is a brief overview of the causes and recommendations:

1. Cause:
UV radiation breaks down the chemical bonds in color pigments and melamine resin foil, leading to fading.

2. Material differences:
MDF with a foil coating is more susceptible than painted boards or real wood veneers with UV protection.

3. Temperature:
Heat can accelerate the process.

4. Protection tips:
- Place near windows with UV filter films
- Alternatively, use curtains or blinds
- Regularly rotate furniture for even wear
- If possible, apply a clear coat with UV protection

In summary, color fading is a physical-chemical process triggered by sunlight that cannot be completely avoided but can be slowed down with appropriate protective measures.

Hello everyone! 🙂 What an exciting topic. Colors don’t just fade randomly; it happens due to a pretty interesting chemical process.

I once read that all these pigments are actually “broken down” by sunlight. It’s almost like the color molecules are “shattered” by the UV rays.

That also explains why some furniture looks nice for longer when kept in the shade, because it’s protected from UV exposure. So here’s a tip for all sun lovers: better give your beloved BILLYs some shade! 😉

Oh, and I also found windows with UV protection film really helpful – who wants their shelf to look like a vintage piece when it’s not supposed to?

Thank you all for the detailed and interesting responses!

The explanations about the photochemical degradation of pigments and the role of the melamine foil were especially helpful to me.

To add some context: my shelves are located on the south side with many hours of direct sunlight, which definitely speeds up the process.

I am also curious if there are differences in fading behavior among the various color options of BILLY (e.g., white, black-brown, birch), since the pigment compositions vary.

Additionally, I am considering whether applying a UV-protective varnish myself might be a good idea—does anyone have insights or experience with this?

Kekonau schrieb:
I’m curious whether the different color variants of BILLY (e.g. white, dark brown, birch) show differences in fading behavior, since the pigment compositions vary.

Great question!

There are indeed colors with varying UV resistance, which depends on the chemical stability of the pigments used.

Whites are usually based on titanium dioxide, which is relatively stable against UV radiation, so white surfaces often fade less.

Darker colors like dark brown, on the other hand, can contain organic pigments that are more sensitive to light and therefore tend to fade faster.

Birch and other wood-patterned finishes often use printed foils with pigments that can also react differently.

Regarding UV-protective coatings: Applying an additional layer of UV-stabilized clear coat can help, provided the right product is chosen — compatibility with the existing surface is essential to avoid damaging the foil or causing unwanted mattness.

I recommend testing on an inconspicuous area before applying it to a large surface.

Hope this helps!

Kekonau schrieb:
Whether there are differences in fading behavior among the various color options of BILLY

To add to that:

– White tends to be the most stable.
– Dark colors often show more noticeable color shifts, sometimes appearing "faded" or grayish.
– Wood finishes can also age under UV exposure, which is perceived as a "patina."

If you want to experiment with UV-protective varnish, make sure to use acrylic- or polyurethane-based coatings with UV stabilizers to prevent discoloration or stickiness.

Applying too thick a layer can also alter the original surface, so it’s better to apply thinly and allow to dry thoroughly.