How do you properly double glaze pottery?

Properly double glazing pottery involves applying two layers of glaze to a ceramic piece to enhance its durability and aesthetic appeal. This technique can add depth to colors and create unique surface effects. To achieve the best results, it’s important to follow a systematic process, ensuring each layer adheres properly and achieves the desired finish.

What is Double Glazing in Pottery?

Double glazing in pottery refers to the application of two separate layers of glaze on a ceramic piece. This technique can create more vibrant colors, intricate textures, and increased durability. By carefully managing the glaze application and firing process, potters can achieve stunning visual effects that are not possible with a single glaze layer.

Why Consider Double Glazing?

Double glazing offers several benefits that can enhance the quality and visual appeal of pottery:

• Enhanced Color Depth: The combination of two glazes can produce richer and more complex colors.
• Unique Textures: Layering glazes can create interesting textures and surface finishes.
• Increased Durability: A second glaze layer can add extra protection to the pottery, making it more resistant to wear and tear.

How to Properly Double Glaze Pottery

Step 1: Select the Right Glazes

Choosing the right glazes is crucial for successful double glazing. Consider the following:

• Compatibility: Ensure that both glazes are compatible in terms of firing temperature and chemical composition. Incompatible glazes can lead to defects such as crazing or peeling.
• Color Interaction: Think about how the colors will interact. Some glazes may blend harmoniously, while others might create unexpected results.

Step 2: Apply the First Glaze Layer

• Preparation: Clean the bisque-fired pottery to remove dust and grease. This ensures proper adhesion of the glaze.
• Application: Use a brush, dip, or spray the first glaze layer evenly. Allow it to dry completely before proceeding.

Step 3: Fire the First Glaze Layer

• Firing: Fire the piece to the appropriate temperature for the first glaze. This step is crucial to set the glaze and prepare it for the second layer.

Step 4: Apply the Second Glaze Layer

• Cooling: Allow the pottery to cool down completely after the first firing.
• Application: Apply the second glaze layer using a method that complements the first. Ensure even coverage to avoid defects.

Step 5: Fire the Second Glaze Layer

• Final Firing: Fire the pottery again, following the temperature guidelines for the second glaze. Monitor the kiln closely to achieve the desired finish.

Tips for Successful Double Glazing

• Test First: Always test your glaze combinations on a sample piece before applying them to your final work.
• Control Thickness: Be mindful of the glaze thickness. Too much glaze can cause runs or drips during firing.
• Experiment with Techniques: Try different application techniques, such as sponging or layering with a brush, to achieve unique effects.

Example: Double Glazing Techniques

Consider a potter who wants to create a piece with a deep blue base and a glossy white overlay. Here’s how they might approach it:

1. First Glaze: Apply a cobalt blue glaze and fire it to cone 6.
2. Second Glaze: After cooling, apply a semi-transparent white glaze.
3. Final Firing: Fire the piece again at cone 6, allowing the white glaze to interact with the blue base, creating a unique marbled effect.

People Also Ask

What Types of Glazes Work Best for Double Glazing?

For double glazing, it’s best to use glazes that are formulated for similar firing temperatures. Look for glazes that are known to interact well, such as a matte underglaze with a glossy top glaze.

Can You Double Glaze on Any Pottery?

Double glazing is suitable for most bisque-fired ceramics. However, it’s essential to ensure that the pottery can withstand multiple firings without compromising its structural integrity.

How Do You Prevent Glaze Defects in Double Glazing?

To prevent glaze defects, ensure that each glaze layer is applied evenly and that the pottery is fired at the correct temperature. Testing glaze combinations on a sample piece can also help identify potential issues.

Is Double Glazing Suitable for Beginners?

While double glazing can be more complex than single glazing, beginners can still try it by starting with simple glaze combinations and testing on small pieces.

What Are Common Mistakes in Double Glazing?

Common mistakes include using incompatible glazes, applying too much glaze, and not allowing sufficient drying time between layers. These can lead to defects such as crazing, peeling, or uneven finishes.

Conclusion

Double glazing pottery is a rewarding technique that can significantly enhance the visual appeal and durability of ceramic pieces. By carefully selecting compatible glazes and following a systematic process, you can achieve stunning results that showcase your creativity and craftsmanship. Experiment with different glaze combinations and techniques to discover the unique effects you can create. For more pottery tips, consider exploring topics like glaze chemistry or advanced firing techniques.