How to Care for Raku Pottery

Raku pottery is a unique and beautiful form of ceramic art that requires special care to preserve its distinctive appearance and delicate structure. Originally developed in Japan, raku pottery is known for its striking textures, unpredictable glaze patterns, and smoky finishes, which are achieved through a specialized firing process. Due to the porous and fragile nature of these pieces, proper handling and upkeep are essential to ensure their longevity and aesthetic appeal. This guide will provide tips and best practices for how to care for raku pottery, allowing you to enjoy its beauty for years to come.

What Makes Raku Pottery Different

Raku pottery stands apart from other ceramics in both its creation process and its distinctive appearance. Unlike traditional pottery, raku pieces are typically removed from the kiln while still glowing hot, a practice that contributes to their unique textures and finishes. This sudden exposure to cool air or combustible materials, such as sawdust or leaves, creates irregular glaze patterns, crackles, and sometimes smoky or metallic effects that are impossible to replicate precisely.

The process embraces unpredictability, making each piece a one-of-a-kind work of art. Furthermore, raku pottery is typically more porous and lighter compared to other ceramics, adding to its fragile and delicate charm. These qualities, rooted in tradition and spontaneity, make raku pottery a favorite among collectors and artisans alike.

Is Raku Pottery Functional or Decorative

While raku pottery is undeniably beautiful, its functionality is often limited compared to other forms of ceramics. Due to the rapid cooling process and the porous nature of the material, raku pieces are typically not watertight or suitable for food storage. For this reason, most raku pottery serves a primarily decorative purpose, designed to be admired for its unique textures, finishes, and artistic qualities. However, some artists do create pieces intended for light, non-functional use, but care must be taken to ensure they are safe and meet specific standards. Ultimately, the appeal of raku pottery lies in its aesthetic value and the story behind its creation, making it a treasured addition to artistic collections and displays.

10 Methods How to Care for Raku Pottery

1. Handle with Clean, Dry Hands to Prevent Surface Damage

Raku pottery is well known for its distinctive crackle glazes and metallic finishes, which, while visually captivating, are often delicate and porous. To properly care for these pieces, begin by handling them with clean, dry hands—or better yet, with soft cotton gloves. Oils and moisture from your skin can leave permanent marks or even cause discoloration, especially on metallic or unglazed surfaces. By making it a habit to handle your Raku pieces with care and awareness, you’ll prevent unnecessary blemishes and preserve their natural finish over time.

2. Display Raku Pottery Away from Direct Sunlight

Sunlight may be vital for plants, but it can be detrimental to Raku pottery. The pigments and glazes used in these low-fire ceramics are often unstable under prolonged UV exposure. Over time, sunlight can cause fading, discoloration, or thermal stress leading to cracking. For this reason, it’s advisable to display your Raku in areas where it won’t be subjected to direct or harsh lighting. Opt for soft ambient lighting or LED spotlighting if you wish to highlight its beauty, and rotate the piece occasionally to avoid uneven exposure.

3. Dust Regularly Using a Soft Brush or Cloth

One of the simplest yet most essential care routines for Raku pottery is regular dusting. Since many Raku pieces feature textured surfaces or intricate crackles, a soft-bristled brush—such as those used for makeup or painting—is ideal. This allows you to remove dust from crevices without scratching the glaze. Alternatively, a clean, lint-free microfiber cloth can be used for smoother surfaces. Avoid feather dusters or rough fabrics, which may catch on raised areas and cause microabrasions. Frequent gentle dusting can greatly extend the visual integrity of your piece.

4. Avoid Water and Never Submerge the Pottery

Raku pottery is typically not fully vitrified due to the rapid cooling process in its firing method, making it more porous than high-fired ceramics. This means it can absorb water, leading to weakening, internal staining, or mold growth over time. Always avoid submerging your Raku piece in water or using it for holding liquids unless it has been specifically treated and sealed for such use. For any necessary cleaning, use a slightly damp cloth, and dry the piece immediately and thoroughly after wiping.

5. Keep in a Stable, Low-Humidity Environment

Like many ceramics, Raku pottery is sensitive to environmental changes. Fluctuating humidity and temperature can cause expansion and contraction of the clay body, leading to cracking or warping. Ideally, Raku pieces should be stored or displayed in a stable, indoor environment where humidity levels are controlled. Avoid placing them in bathrooms, kitchens, or unheated spaces like garages. For collectors in more humid climates, a dehumidifier or desiccant pack in display cases can help maintain optimal storage conditions.

6. Avoid Using Commercial Cleaners or Polishes

Due to the delicate nature of Raku glazes—especially those with metallic or crackle finishes—it’s important to steer clear of commercial cleaners or polishing agents. These products often contain harsh chemicals that can strip glaze, alter color, or seep into the porous clay body, causing long-term damage. Even natural cleaning agents like vinegar or baking soda can have unintended consequences. If your piece needs more than just dusting, the safest approach is to consult a conservator familiar with Raku pottery.

7. Store or Transport with Adequate Padding

When moving or storing your Raku pottery, extra precautions are needed to prevent chipping, cracking, or scratching. Wrap the piece in acid-free tissue paper or unbleached cotton cloth before placing it into a padded box or container. Ensure it is cushioned on all sides with soft materials like foam or bubble wrap, but avoid materials that might stick to the glaze. Never stack Raku pieces directly on top of one another, as the weight can cause pressure fractures or glaze scratches.

8. Use a Display Case or Dome for High-Value Pieces

For those with heirloom or high-value Raku items, consider placing the piece in a display case or glass dome. Not only does this keep dust, moisture, and UV exposure at bay, but it also protects against accidental bumps or curious pets. A case with good airflow ensures that humidity does not get trapped inside, while a UV-filtering glass can add another layer of protection against color fading. Displaying your piece this way not only preserves it but elevates its presence in your home or gallery.

9. Understand That Raku Is for Display, Not Functional Use

One of the most common misunderstandings with Raku pottery is mistaking it for functional ware. Unless explicitly made food-safe and sealed, Raku pieces should not be used for holding food, water, or plants. The porous nature of the clay can harbor bacteria, and the glazes may contain metals not suitable for consumption. Treat Raku as a decorative art form—a medium for visual appreciation and storytelling, rather than utilitarian use. Respecting its intended function ensures its longevity and safe handling.

10. Consult a Specialist for Restoration or Preservation Needs

If your Raku piece becomes damaged—be it chipped, stained, or cracked—resist the temptation to repair it using household glue or DIY kits. These materials often contain solvents that can further harm the ceramic or discolor it permanently. Instead, reach out to a ceramics conservator or a professional restorer who has experience with Raku ware. They can assess the damage properly, offer restoration options, and provide advice on preventive care going forward. Professional insight can mean the difference between a botched repair and a beautifully preserved piece.

Maintenance and Upkeep

Proper maintenance is essential to ensure the longevity of your Raku ware. Begin by handling each piece gently, as the delicate nature of Raku ceramics makes them prone to chipping and cracking. When cleaning, always use a soft, damp cloth and avoid harsh scrubbing or abrasive cleaners, as these can scratch the surface or erode the glaze. Keep Raku ware away from direct sunlight and extreme temperature changes, as these conditions can weaken the ceramic over time. If storing your pieces, ensure they are placed in a stable, padded area to prevent unnecessary movement or impact.

Regularly inspecting your Raku ware for any signs of damage can help identify issues early, allowing for timely professional intervention if needed. With attentive care, your cherished Raku ware can remain a treasured part of your collection for years to come.

Conclusion

Raku pottery, with its smoky elegance, unpredictable glaze effects, and handmade character, is a true celebration of imperfection and natural beauty. However, these very features also make it uniquely vulnerable to damage, fading, and wear. By following these ten carefully considered methods, you can ensure your Raku piece remains as expressive and inspiring as the day it was created. Thanks for reading our blog post on how to care for raku pottery! We hope you found it helpful and informative.