Why Your Brass Sink Changes Color (And Why That's a Good Thing)

This post is a guest feature generously shared with us by Alejandra Ochoa de Thompson, founder and creative visionary of Thompson. We love their philosophy on living materials and are thrilled to share their expert insights on the beauty of natural brass patinas.

When people imagine luxury, they often imagine perfection frozen in time. But some of the world's most treasured materials have never worked that way. Sterling silver develops character. Fine leather softens and deepens with use. Natural stone tells the story of the years it has lived within a home.

Brass is no different.

Our Raw Brass finish is intentionally designed to evolve over time. Your sink isn't deteriorating, it's developing a patina unique to your home, your routines, and your life.

That subtle darkening around the drain, the soft variations in tone that appear with time, they're not imperfections. They're evidence that your handcrafted piece is exactly what it was designed to be. Because luxury doesn't always stay the same. Sometimes, it becomes even more beautiful with time.

What Is Patina?

Patina is the natural process that occurs when metal interacts with its environment. Exposure to water, air, oils from your hands, and daily use creates subtle variations in color and tone that make every piece uniquely yours.

Unlike mass-produced finishes designed to remain identical forever, Raw finishes celebrate change. No two Thompson brass sinks will ever age in the same way, and that's entirely intentional.

Each piece begins by hand and continues evolving long after it arrives in your home.

The Journey of a Raw Brass Finish

Your sink's finish is called Raw. Our Raw Finish was previously called Living Polished Finish. "Living" wasn't just a nice word, it simply showed that the finish evolved.

Unlike some of our other finishes, Raw brass doesn't receive a protective coating. Nothing is sealing it off from the world, so it continues changing a little every day, long after it leaves our workshop. Because these finishes are living materials, the patina process may even begin during transit, and that's completely normal.

In plain terms, some finishes are made to freeze in place and stay exactly as they are. Raw finishes were made to keep going. That's not something going wrong, it's the whole idea, built in from day one.

Think about how a shiny new penny slowly turns a deeper brown the longer it's out in the world, or how a favorite leather bag becomes richer and warmer with use. Your brass sink is doing that same kind of thing.

Because there's no coating, your sink is always in touch with everyday life, whether it is the air in your kitchen, water from the tap, and the oils on your hands every time you use it. All of that quiet, everyday contact slowly changes the color of the surface.

Patina isn't dirt, and it isn't damage. Patina is brass evolving over time. And, it contributes to the brass health benefits you keep reading about.

One of the things we love most about Raw finishes is that there isn't a right or wrong way to enjoy them. You can:

• Allow the patina to develop naturally.

• Regularly polish the finish to maintain its original brilliance.

• Choose something in between.

Our Raw brass finishes include:

• Polished Brass

• Semi-Satin Brass

• Satin Brass

• Polished Rose Gold

• Satin Rose Gold

(Some of these finishes may also be available in sealed versions.)

Why Does My Sink Look Uneven?

This is perhaps the question we receive most often.

When a Raw Finish begins developing its patina, the process isn't perfectly uniform. Certain areas may darken more quickly than others depending on water exposure and everyday use.

During the first few weeks, you may notice:

• Water spots

• Darker areas around the drain

• Slight variations in color

• Uneven aging patterns

The good news? That's completely expected.

As the finish continues to evolve, the patina generally begins evening itself out over approximately two to four weeks.

Think of it less like paint and more like fine leather, it develops character before it develops consistency.

Why No Two Sinks Age the Same Way

Because patina forms through contact, it follows the shape of how you actually use your sink, not a factory schedule.

High-Touch Areas

Spots near the faucet or drain that your hands meet every day may develop a brighter, burnished appearance from frequent contact and gentle friction.

Water Zones

Areas that stay wet longer tend to darken faster, while surfaces that dry quickly may retain lighter tones for longer.

Your Water

Hard water minerals and softened water interact with brass differently, which is part of why the very same sink model can age differently in two different homes.

Everyday Life

Even things like cooking oils or an occasional acidic splash leave a subtle signature over time. Your sink is quietly recording how your kitchen lives.

The Routine That Shapes It

Your care routine doesn't stop patina-it simply helps guide it.

DO:

• Wash with mild soap and water; dry to prevent spotting

• Restore shine with a gentle copper cleaner as needed

• Wax after cleaning to slow the patina, if you prefer the bright look

AVOID:

• Abrasive cleaners, scrub pads, steel wool

You Have More Say Than You'd Think

You can't stop a Raw finish from evolving, but you can influence the pace and evenness of it.

Want it to age more slowly and evenly? Wax it regularly and dry the surface after every use. This helps slow new patina from forming and keeps the tone more uniform across the sink.

Happy to let it deepen more quickly? Stick to mild soap and water and skip the wax. The finish will develop richer antique tones faster, with more natural variation across the surface.

There's no wrong choice-only the one that's right for your home.

The Beauty of Something Made by Hand

There's something wonderfully human about materials that change over time. A handcrafted brass sink isn't meant to look the same ten years from now as it did the day it arrived. It's meant to tell the story of where it has lived and how it has been loved.

That evolving beauty is what makes our Raw finishes so special.

No two homes are alike. No two Thompson pieces are alike. And no two patinas will ever be alike.

The subtle changes you see aren't flaws to be corrected-they're the signature of a truly living material. And that's a very good thing.