Is pottery microwave safe

Microwave ovens are becoming a standard fixture in the majority of kitchens. Since they can cook and reheat food, microwave ovens use various ceramics. The question remains unanswered. Can you microwave any pottery?

This problem’s solution is a little more complex than it first appears. Use of earthenware embellished with gold, silver, or other precious metals in microwave ovens is generally prohibited.

Find out weather pottery is microwave safe or not below

Ceramics shouldn’t be used with any metal in a microwave. However, further constraints will depend on the type of ceramic being used. It is not a simple process for the consumer.

pottery baking in microwave

Pottery comes in wide varieties!

Since pottery is currently made worldwide, it may be challenging to identify its origin, quality, or kind. However, microwave ovens are often compatible with ceramics that have been fired at high temperatures and are impermeable.

These ceramics include cookware made of vitreous materials, porcelain, bone china, and stoneware. Proceed with caution when handling other ceramics that haven’t been fired at high temperatures. For these goods to be used safely, it is imperative to ensure that they are both dry and have not absorbed any water.

For instance, while the object is being washed or kept in the refrigerator, among other circumstances, this could happen. Serious safety precautions are required for these goods. In-depth safety instructions are necessary for the usage of these goods.

To better serve their customers, top brands mark their items as “microwave safe.” It is impossible for lesser-known items, which usually have no labels, to offer this assurance. Be cautious when purchasing, and try to stay away from using a microwave. Keep an eye out for BS or CE standards as confirmation that a particular criterion has been met.

Types of kilns for ceramic pottery shared here

Cooking while taking care of the pottery

Keep the following precautions in mind when using ceramics for heating or preparing food.

  • The pot or dish should not touch a direct flame. Few ceramic cooking pans are suitable for use on a cooktop; the bulk is only made for baking or heating. Only ceramic pans marked “stovetop safe” should be used. Additionally, if you’re making the pot from scratch, you must research and experiment with the clay ingredients.
  • Use mild heating if the dish is packed with food or fluids.
  • A flat clay dish shouldn’t be heated or baked too long. Long-term baking will almost certainly cause it to break. Pots, however, work well for prolonged cooking. if your dish is broken then you can join it by kintsugi method
  • Avoid preheating the oven if you intend to bake or heat food. Place the meal in the baking dish and then into the cold range. Preheating is futile because the ceramic will heat up while the food is prepared. Additionally, it might damage the liner of your dish.
  • In a heated baking dish, never add cold water. This will very certainly lead to cracking.
  • Never use an empty clay plate in a microwave or oven. Ensure enough liquid or food is in the dish to fill it halfway or more.
  • Never set a hot clay dish on a cold or wet surface.
  • Always use a different earthenware plate when reheating leftovers or frozen food. Try to avoid reheating food that was stored in ceramic for refrigeration purposes. If you have the time, wait until the dish is at room temperature.
  • To warm pottery plates, bowls, or mugs, do not stack them in the microwave.
  • Don’t place hot food inside pottery stored in a cool cabinet away from light and heat. Let the dish warm up to room temperature for a few minutes.
  • Before adding boiling water, rinse the mug with warm water. Adapting to temperature changes gradually is necessary for pottery.
  • You can reheat frozen food in pottery, but you’ll have to swap the plates twice. Glass or plastic are preferred.
  • In a similar vein, warm up plates and bowls before adding boiling stew, curry, roast, or soup.
  • Pottery warms up quickly; thus, food or beverage will warm up more quickly. Microwave the mug for two to three minutes if you’re heating milk or water. Heat for no longer than 6 minutes.

How to Use the Microwave to Harden Modeling Clay?

Modeling materials, such as polymer clay, are available in various colors and patterns, such as neon, glitter, and stone. Two popular brands are Fimo and Sculpey. Polymer clay can be cooked in a convection oven on a low setting for 15 to 30 minutes. Conventional wisdom says not to microwave the clay. But if you keep the modeling clay moist, you can microwave it securely.


  • In the microwave-safe bowl, put your clay creation. It is not recommended to use a ceramic bowl because the polymer clay may react poorly with it.
  • The object is submerged in water. Make sure the item is covered the entire time it is baking.
  • Spend roughly two minutes in the microwave for smaller items like beads. Set the timer for at least ten minutes when preparing larger chunks. For every 100 grams (approximately 3.5 ounces) of clay, it’s a decent rule of thumb to microwave the item for 10 minutes.
  • Boil the water continuously until you think the clay is cooked. The item will swiftly burn and emit smoke if it dries out. Give the clay time to cool.


For optimal results, use a container that is proportionate to your item. At least two brands of modeling clay are made expressly to harden in a microwave, both in approximately ten minutes, as of my last decades of experiment results. The white or terra cotta Fimo Air Microwave modeling clay and the Staedtler Fimo Efaplast clay can be used for various projects, including texture sheets and molds.

Microwave-hardening clays have components that enable even heating both internally and outside. If you’d prefer, you may air dry these instead.


Use water-based modeling clay in the microwave rather than oil-based clay. Children’s modeling clay also contains wax and oil, which prevents it from hardening.

Is The Use of a Handmade Pottery Microwave Safe?  

Regarding whether or not handmade pottery is microwave safe, I’ve observed that there is still a lot of misunderstanding. Sometimes it’s thought that using ceramics in the microwave is not a good idea.

However, rest assured that your favorite handcrafted cup or plate can be used in the microwave if it doesn’t absorb water outright. The artwork should also have a gloss that is appropriate for daily use. However, that is always crucial, not just when using a microwave.

Personally i have been using ceramic kitchenware to make meals and reheat the leftovers for long time including heating water sometimes in ceramic cups and haven’t found any issue with using pottery items in microwave for short durations of 10-20 minutes beyond which i haven’t tried with ceramic.

only drawback that i found is that after prolonged heating in microwave in one go the ceramic dish/glass etc. get really hot and cant be handled with bare hands, you would require a microwave safe gloves from local kitchen accessory store or online retailer to keep using ceramics/glass utensils with your microwave.

handmade mugs with printed design microwave safe

ASTM specification for ceramics suitable for microwaves

The most important factor is, as stated before, that practical pottery does not absorb water. When that happens, the container becomes quite hot, and the water within the container is cooked in the microwave to steam. The ASTM has created a global standard as a result. It establishes quality standards that ensure food heating may be done safely.

If ceramic utensils achieve this standard, they are considered “microwave safe.” Please be aware that while the ware itself does heat up in the microwave, the food within or on top of it does not. The ceramic kitchenware could consequently get hot as a result.

Stoneware and porcelain absorb less than 1% water when appropriately heated, making them practically “microwave safe.” It’s less frequent. However, some earthenware (whose clay is made explicitly for low absorption at lower temperatures) might also work.

Ceramics made by hand that are microwave-safe?

The handcrafted pottery’s glaze must, of course, be functional (non-toxic and preferably also dishwasher resistant). In addition, stay away from embellishing items with metallic brilliance, such as a cup’s lip with a gold border. Such (fragile) coatings of metal have the potential to spark in the microwave. This prevents cutlery from being heated in the microwave.

Consider that when using handmade pottery, including in the microwave.

How to Determine whether a Dish Bought at the Store Is Microwave Safe?

Although most ceramics can be microwaved without shattering, there are several precautions you may take to protect your food:

  • Keep an eye out for a “microwave-safe” label. The label is located on the ceramic dish’s or mug’s base. “Microwave-safe” or “microwave-friendly” can be stamped on the bottom. You can use either in place of the other.
  • You can microwave most of your porcelain, china, and earthenware. Most porcelain and bisque tableware can be reheated in the microwave without damage. An exception may be allowed if the dish’s maker indicates that it cannot be microwaved or if the dish has metallic paint, coating, or trim.
  • Be careful not to microwave any lead-glazed ceramics.
  • Several well-known manufacturers produce heat-resistant and microwave-safe cookware. Their whole line, including their ceramics, is suitable for oven use. These brands comprise:

Anchor Hocking Visions Duralex Pyrex and Corningware

  • You can also microwave an object with two or three waves.
  • Furthermore, you must avoid using your lead-glazed porcelain in a microwave.
microwave safe logo identification on ceramic kitchenware
microwave safe logo identification on ceramic kitchenware

The majority of high-fired ceramics can be used in microwaves. Be on the lookout for branded items’ labeling that assures you that the product is suitable for use in a microwave. It’s preferable to “keep out” if you’re unsure.

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