I have a basic question that has been on my mind for some time: Why do some IKEA Billy shelves change color over time? I have noticed that some of the white shelves I bought a few years ago now have a slight yellow tint or a darker shade, even though they are placed in bright, enclosed rooms. I wonder if this is due to material aging, UV exposure, chemical reactions in the paint or wood, or perhaps humidity. Maybe factors like direct sunlight or room temperature also play a role? I look forward to well-informed explanations and any tips on how to prevent this discoloration issue as much as possible.
The discoloration of Billy shelves is actually due to a combination of environmental factors and material properties. On one hand, the white foil coating or melamine resin applied to particleboard undergoes a chemical change over time caused by UV exposure. This results in a gradual yellowing. In addition, certain plastics or glue layers within the particleboard core react with components in the air, especially under increased humidity or temperature fluctuations, leading to slight discoloration. The yellowish tint is therefore a degradation product of these processes. Room air also plays a role: dust, cigarette smoke, and other environmental influences settle on the surface and visually enhance the color change. UV-protective window films or indirect lighting can help reduce the discoloration. Overall, this is a normal aging process of the material that is hardly preventable.
Dopoki schrieb:
The discoloration of Billy shelves is actually due to a combination of environmental factors and material properties. Exactly! The white Billy shelf isn’t really “pure white”; it’s a coated surface that changes over time. If you place your shelves directly by the window and get a lot of sunlight, unfortunately they will start to change—that’s basically their aging process, though it might look unpleasant to the eye. Additionally, air quality and dust play a role, especially with cigarette smoke or in urban areas. I like to compare it to old books yellowing—even though it’s not paper here, the basic principle is similar 😉 Tip: Try moving the shelf further away from direct daylight and dust it regularly. This way, the white stays fresher for longer.Another aspect I would like to add concerns the material processing in the manufacturing process. Billy shelves often use particleboard as the core material, which is covered with a foil or lacquer layer. Over time, moisture can penetrate the material, causing certain chemical compounds in the wood and adhesive or in the particleboard structure to oxidize. This oxidation causes the yellowing tint. This change is usually more pronounced at the edges or in less protected areas. Additionally, older furniture pieces may have coatings that are less UV resistant than newer models, which further intensifies the color change. If you notice this issue particularly strongly, I recommend paying attention to proper care and indoor humidity, which should ideally be maintained between 40-60%. This helps prevent excessive moisture absorption.
GiRoyce schrieb:
Over time, moisture can penetrate the material, causing certain chemical compounds in the wood and adhesive, as well as in the chipboard structure, to oxidize. Interesting, but honestly, I think that’s only part of the story. Who really knows what cheap chemicals IKEA uses in production? There is strong evidence that the surface is treated with substances that are not fully UV-stable – which significantly accelerates yellowing.
meGreg schrieb:
Tip: Try placing the shelf further away from direct daylight and regularly dust it. Sure, that helps somewhat, but who wants to keep their shelf only in dark corners? You might think IKEA sells these as “white,” but in reality, they are cardboard furniture with built-in ageing. Let’s just call it a statement against IKEA’s material policy.
My opinion: If you want a truly long-lasting white shelf, you either have to invest considerably more or sand and repaint it yourself. Everyone else should accept it and stay relaxed 😉
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