Understanding Handmade Mugs: Are They Dishwasher Safe?

Are you considering getting a handmade mug but aren't sure if it's dishwasher safe? Unlike mass-produced tableware, handmade ceramics usually don’t come with symbols or labels indicating their dishwasher safety. If you've ever wondered why some makers recommend handwashing their ceramics, here's the reason why.

In part 1, I discussed how unglazed areas of a mug can absorb small amounts of water and eventually weaken the mug, even after firing at high temperatures.

In this post, let's dive into the durability of glaze. Glaze plays a vital role in the longevity of ceramic pieces, especially when they’re meant for everyday use like mugs, bowls, or plates.

Two handmade ceramic bowls with a glossy glaze finish, displayed on a woven mat, showcasing their elegant blend of texture and colour.

What Does Glaze Do?

Glaze is a glass-like coating applied to the surface of ceramics before the final firing. It creates a smooth, sealed layer that:

• Protects the Clay Body: Glaze acts as a barrier, preventing water, oils, and stains from penetrating the porous clay beneath. This makes the ceramic more durable and suitable for repeated use.

  
  

• Enhances Strength: The glaze layer adds structural integrity, helping the ceramic withstand scratches, impacts, and the high temperatures of dishwashers and microwaves.

  
  

Durability Factors of Glaze

The durability of glaze is influenced by several factors:

• Firing Temperature: Glazes fired at higher temperatures, such as those on stoneware or porcelain, are generally more durable. The clay and glaze fuse more completely at high temperatures. In contrast, low-fire glazes, while vibrant and colorful, may be less resilient to wear and tear.

  
  

• Glaze Composition: A well-formulated glaze creates a strong, even coating. Poor-quality or improperly mixed glazes may crack, chip, or craze (develop fine cracks) over time, which reduces the piece’s durability.

  
  

• Glaze Application: The method of applying glaze affects its longevity. A thick, even layer ensures maximum protection, while a thin or uneven application may leave vulnerable spots on the ceramic.

  
  

• Wear Resistance: A high-quality glaze resists scratching and scuffing from utensils or stacking. Durable glazes are ideal for everyday use and maintain their shine and functionality even with frequent handling.

  
  

Glaze in Functional Ceramics

For functional ceramics like mugs or plates, glaze durability is crucial. A durable glaze ensures that:

• The piece remains food-safe and hygienic, as no liquids or food particles seep into the clay.

  
  

• It can withstand temperature changes, such as transitioning from hot beverages to a cool wash in the dishwasher, without cracking or crazing.

  
  

• The aesthetic appeal of the piece lasts, even with the abrasive effects of dishwasher detergent.

  
  

Considerations for Care

When caring for handmade ceramic mugs, consider these tips to maintain their appearance and functionality:

• Handwashing: While some handmade mugs may be dishwasher safe, handwashing extends their lifespan. Use a gentle sponge and avoid abrasive materials that can scratch the glaze.

  
  

• Avoiding Sudden Temperature Changes: Sudden changes in temperature can cause thermal shock and crack the mug. Allow the mug to cool down before washing it in cooler water.

  
  

• Storing Properly: stack mugs carefully to avoid chipping. You can use shelf liners to minimize friction between pieces.

  
  

Conclusion

In summary, a good glaze isn’t just about making ceramics beautiful. It’s essential for creating long-lasting, functional pieces that can withstand daily use. When investing in a handmade mug, keep in mind that proper care will ensure you can enjoy your piece for years to come. Choosing high-quality ceramics can be beneficial since they often feature durable glazes.

Don't forget to shop for ceramics that align with your lifestyle and aesthetic!

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