Why does wood change color? (2024)

Just as our skin is affected by sunny beach trips and drinking the recommended eight glasses of water per day, wood, too, responds to its environment. Once a living, breathing tree, natural wood furniture will continue to evolve even after the last edge is sanded and corner finished. One of the coolest phenomena is the continuing aging process of wood as the colors change appearance over time and a wonderful patina develops.

Hardwood Color Changes Over Time

All hardwoods will undergo the natural aging process and change color overtime with exposure to UV light and oxygen. In general, while lighter woods tend to become a bit darker and richer, woods that begin dark will lighten up.

We all know and love cherry as a rich reddish brown color. However, freshly cut cherry boards have a light color much closer to straw. At Chilton, we personally love the look at this early stage of the wood, but the surface is so light, that it is often confused with maple. Within a few weeks, change is noticeable, as hints of red begin to develop, though the wood is still light. It will take about six to 12 months to reach that rich dark hue that so many people have come to expect with cherry, depending on light exposure, and this reddish tone will only continue to deepen as time goes on.

Comparison of newly built cherry table with light straw color and naturally aged cherry table with deep red color.

Like cherry, maple will darken over time, though far less dramatically. Maple starts off very light and bright, with a few pink and grey tones. Over time, it will age to a warm golden honey color. Other light brown woods, like ash and white oak will slightly darken to a beige or amber color.

Why does wood change color? (1)

Comparison of newly built maplemedia stand with light pink color and naturally aged maple dresser with golden honey color.

Of the primary woods Chilton offers, walnut is the most different in its aging process. Rather than darkening over time, walnut begins as a beautiful, rich dark brown color and over time will gradually lighten, taking on notes of honey throughout.

Why Does This Happen?

The two main culprits for this mysterious color transformation are exposure to air (oxidation) and light. When the wood surface interacts with air and ultraviolet light, the process is set in motion, and it can’t be stopped (unless you live in a dark cave), but it can be sped up a bit, especially with cherry. You will see the majority of the darkening process naturally occur within the first year (and significant changes start within the first few weeks and months). But if you can’t wait that long, try setting your chair on the porch or moving your dining table in front of a large window on sunny days. The added light will provide an extra boost to the aging process so you can experience richer cherry tones sooner.

In addition to the effect from its environment, wood color can vary greatly between trees and even along different boards from the same tree. This variation adds natural character and beauty to your wood furniture.

Avoid Shadowing

One word of caution - prevent shadowing by periodically moving around objects on your wood furniture, especially on cherry. If you leave a lamp on your brand new cherry side table for two weeks, you will notice a lighter circle from the lamp base surrounded by a darker table top. Has this happened to you already? Not to worry - simply move the lamp and that shadow will soon catch up with the rest of the piece and the color will even out.

Why does wood change color? (2)

Portion of cherry dresser (in circle) is "shadowed," or appears lighter, caused by lamp left in place for too long (now moved to right) preventing sunlight from hitting that portion of the dresser.


We love the warm, natural texture of all wood species, as well as the living quality each wood type offers as its patina evolves. Treat your wood furniture well, be gentle on its surface, and we hope you too can savor every color stage.

Why does wood change color? (2024)

FAQs

Why does wood change color? ›

Wood will change color faster in direct sunlight or without any finish on it to slow oxidization. Most of today's applied finishes can slow the changes but won't halt the oxidation process. Typically, wood's color changes only go a few hundredths of an inch deep.

How to stop wood from oxidizing? ›

Wood will change color faster in direct sunlight or without any finish on it to slow oxidization. Most of today's applied finishes can slow the changes but won't halt the oxidation process. Typically, wood's color changes only go a few hundredths of an inch deep.

Does wood change colour over time? ›

The simple answer to this is yes, wood flooring will change colour over the years. Wood is a natural product and changes in colour will occur due to the wood's reaction to the environment. A dark wood such as walnut will lighten and a lighter wood species like oak, will darken.

What wood changes color? ›

aged walnut. New walnut has a consistent dark-brown color but as it gets older, two changes occur. 1: Unlike maple and cherry, it gets lighter. 2: A rich honey color starts to come through the grain.

How do you fix discoloration on wood? ›

Mix equal parts olive oil and distilled white vinegar and rub the stain using a soft cloth. Rub with the grain of the wood, wipe away the residue, and buff the wood to a shine.

How do you remove oxidation from wood? ›

For light rust stains, all you need is a water and vinegar solution. To get rid of tougher rust stains, use oxalic acid to bleach the iron oxide.

Is there a wood sealer that doesn't change the color of the wood? ›

What you want to go for is a finish that is known as “water-white”. This means that when it dries on the surface of the wood, it won't bring any color to the party. Just about any water-based finish fits into this category. There are also water-white lacquers that work very well.

How do you restore wood to its natural color? ›

If you want the wood to appear a bit darker and maintain its natural wooden color, then vinegar is your best choice. Balsamic vinegar or Apple Cider vinegar can both serve the role of darkening your wood color. Applying vinegar with a wire brush will ensure vinegar reaches every grain of the wood surface.

How to seal wood naturally? ›

Coconut Oil: If you're looking for a completely plant-based option, you can use only olive oil as the wood sealant. While it won't create a solid paste like with beeswax, a combination of olive oil and coconut oil can still provide some protection and conditioning to the wood.

What causes wood discoloration? ›

The heartwood por- tion of a tree is often darker than the sapwood and may appear to be discolored. Weathering will usually change the color of wood. In other cases, wood stains are due to the growth of microscopic organisms, the most common of which are harmless staining fungi.

What is the rarest color of wood? ›

Pure black ebony wood, which is the most valuable, only comes from trees that are at least 150 years old. Ebony wood is extremely hard and durable, with a beautifully striped wood grain. It ranges in hue from deep red to solid black.

How long does it take for wood to oxidize? ›

This oxidation may proceed slowly (months) or happen quickly (days or hours). Color changes in lumber, often with dark woods getting darker, and light woods getting lighter or darker, will happen naturally.

What causes wood to oxidize? ›

Changes in colour over time are the effects of oxidation typical of live organic matter like wood and caused by the natural interaction between its component elements with air and light.

How do you keep wood from turning gray? ›

Water-repellent treatments: moisture accelerates wood's greying process, so reducing its ability to penetrate wood is crucial. Water-repellent treatments make wood more resilient to moisture, preventing the associated degradation and wear.

How do you prevent wood corrosion? ›

Tips for Preventing Wood Rot
  1. Always use decay-resistant or pressure-treated lumber for decks. ...
  2. When building an exterior project with wood, stain or paint all sides of each lumber piece before assembly.
  3. Don't lean anything against your siding, such as old plywood, tools, and ladders.

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