White Marble Yellowing: Causes and Prevention

White marble is beautiful but prone to yellowing. If you love white marble, you might wonder why this happens and how to prevent it. Let me explain.

Why Does White Marble Turn Yellow?

Internal Causes

1.Composition of the Marble

Under a microscope, we can see tiny iron minerals in white marble. These minerals react with oxygen in the air, creating rust (the yellow stains we see). If your marble starts to yellow 8-12 months after installation, this could be why.

2.Oxidation Reaction

When iron minerals are exposed to air and water, they oxidize into rust. This process is more pronounced in humid environments. Interestingly, marble placed near a heat source, like a hot water pipe, tends not to yellow as much because the heat keeps the stone dry, reducing oxidation.

External Causes

1.Wear and Tear

Over time, dirt and dust from foot traffic get into the marble’s tiny pores, making it look yellow.

2.Improper Cleaning

Using a dirty mop spreads grime over the marble, causing it to yellow.

3.Wax Build-Up

Many people wax marble to maintain its shine, but over time, the wax layer can age and turn yellow.

4.Crystallization Process

Using steel wool in the crystallization process can leave behind iron particles. When these particles oxidize, they cause yellowing.

Installation Issues

During installation, if proper precautions aren’t taken, alkaline substances (like cement) can seep into the marble, causing it to yellow.

How to Prevent White Marble from Yellowing?

During Processing

1.Choose High-Quality Stone

Avoid marble with obvious iron minerals or cracks.

2.Cutting and Cleaning

Use clean water when cutting marble, not recycled water. Thoroughly clean the marble after cutting to prevent rust stains from tools.

3.Waterproofing

Apply a comprehensive waterproof treatment to the marble, especially the back and edges. Ensure the marble is completely dry before moving to the next step.

4.Packaging

Avoid direct contact between marble and wood or metal during packaging. Use protective film.

5.Installation

Use stainless steel fittings and special adhesives for installation. Keep the installation area clean to prevent alkaline substances from contaminating the marble.

During Installation

1.Surface Treatment

Before installation, apply a waterproof treatment to the back and edges of the marble to prevent water penetration.

2.Environmental Control

Keep the installation site clean and dry to avoid contact with alkaline substances.

During Maintenance

1.Proper Cleaning

Use a clean mop and water. Avoid wet mopping; instead, use a dry mop. Keep the marble surface as dry as possible.

2.Use Appropriate Products

Use specialized marble cleaners, avoiding general cleaners with harmful chemicals.

3.Avoid Waxing

Waxing can block the marble’s pores, leading to yellowing. Opt for non-blocking polishing methods.

4.Crystallization Process

When using steel wool for crystallization, thoroughly clean up any remaining steel wool particles to prevent oxidation.

How to Treat Yellowed White Marble?

If your marble has already yellowed, find the cause first. If it’s not due to wax aging or external pollution, then it’s likely rust.

Removing Rust

There are many rust removers on the market, but most are acidic. Since marble is sensitive to acid, use these products carefully. Apply the rust remover to a few layers of tissue paper placed on the marble surface. After a few hours, the yellow stains should start to disappear. Alternatively, seek professional help from a stone care expert.

Preventing yellowing in white marble involves a combination of proper processing, installation, and maintenance. By choosing high-quality stone, using correct installation methods, and maintaining the marble scientifically, you can keep your marble looking beautiful.

Contact Us

If you have any questions about preventing or treating yellowing in white marble, or if you need professional marble care services, don't hesitate to contact us. Our team of experts is ready to assist you with tailored solutions for your specific needs.