Are Ceramic Plates Microwave Safe?

Yes, ceramic plates are microwave safe with specific safety cautions. They are non-porous, heat resistant, chemically stable, durable, non-stick, and do not spread harmful chemicals into food. You can heat food in a microwave oven without worry as they are heat resistant. 

However, Are ceramic plates microwave safe? In this article, you will get your answer, including what ceramic is safe in the microwave, how to confirm your one is safe or not, the perfect way and timing of ceramic plates in the microwave, etc. To know all the details, scroll below.

Which Ceramics Are Safe in the Microwave?

Generally, there are 3 main types of ceramic plates. Below you will know which are ok for microwaves and which are not.

1. Earthenware Plates

Earthenware Plates

Earthenware plates are microwave safe like other ceramic plates. But they need to be good quality and damage-free so that you can reheat food safely in the microwave. 

But, generally, earthenware plates refer to porous, opaque ceramic plates which absorb water. Because of their high porosity, they absorb microwave radiation and do not heat food fine, and the glaze may crack. 

So, you need to confirm the quality and material of your earthenware plate. And choose good quality, durable and flexible plates for microwaving. The label of the plate and the tips on knowing ceramic plate microwave safety may guide you in this regard.

Moreover, if the earthenware plate contains trim, metal finishing, or paint, it can leach with food, harming your health. So discard these types of plates also. And one thing notable about reheating leftover/food in an earthen is ok but don’t go on a long time cooking with it in the microwave. 

2. Stoneware Plates

Stoneware plates

Stoneware plates are microwave safe; they are also freezer and dishwasher-safe. But, some stoneware plates can contain high levels of arsenic and lead, which can get into your food and cause serious health problems. So ensure that stoneware plates are labeled ‘Microwave Safe’ before using them in the microwave. 

Moreover, you also need to follow the manufacturer’s instructions before using the stoneware in the microwave. Thus, good quality and the perfect way can ensure safe microwaving with stoneware plates. 

Read More: What is the Difference Between Earthenware and Stoneware? 

3. Porcelain Plates

Porcelain Plates

Porcelain plates are safe for use in the microwave. They are made of ceramic and fired at a high temperature of 2,650°F, which makes them very durable, strong, and non-porous. Depending on their decoration, glaze, or manufacturing process, many porcelain plates can be similarly microwave, dishwasher, and oven-safe. 

However, some porcelain plates can crack due to thermal stress. So, avoid keeping very cold food while these plates are hot. Even those comprise gold rims, don’t place them in the microwave.

Like other ceramic wares, check their quality and label of microwave safety considerations. Thus, you can avoid damage like plate cracking or food pollution. 

Read More:

How Do You Know if a Ceramic Plate is Microwave Safe?

The steps below will help determine if your ceramic plate is microwave safe. 

  • First, check the ceramic plate’s label. If it assures you about microwave-safe, then using it is ok. But if there have no mention of microwaving, do a test.
  • You take a microwave-safe mug and a ceramic plate. Then fill the mug with three-quarters of the water. 
  • Place both the mug and the ceramic plate in the microwave. Then heat them on high for one minute. 
  • Take it out of the microwave using an oven mitt or potholder. 
  • Then, carefully touch the plate and water of the mug; if the plate is cooler than the water, then the plate is microwave safe.
  • But if the ceramic plate is hotter to the touch than the water in the mug, they are unsafe for microwaving. 
  • After that, you can separate microwave-safe and unsafe ceramic plates. Moreover, you can use a marker to label the ceramic plate. You can also draw 3 horizontal waves or write the letter “M” under the microwave-safe ceramic plate. 

Thus, if you do not know your ceramic plate is microwave safe and has no label, you can apply the above test.  

Tips for Microwaving Ceramic

Most ceramics are usually microwave safe. But although ceramic microwaves are safe, some safety aspects need to be considered. Below are some tips for microwave ceramics. 

  • Simple ceramic plates can be suitable for decorating, serving, and storing food. But not for microwaves. So choose strong ceramic plates for the microwave. 
  • Do a simple test to determine whether ceramic plates are microwave safe or unsafe. 
  • Avoid stacking ceramic plates, bowls, or mugs to heat in the microwave. 
  • Avoid putting an empty ceramic bowl into the microwave. Instead of an empty ceramic bowl, you can fill the ceramic bowl at least halfway with food or liquid. 
  • When using ceramic plates, you need to avoid rapid temperature changes and thermal shock
  • Avoid microwaving a plate or mug with boiling food or water, as the food or liquid is already hot, so including the microwave’s temperature pressure will lead the plate/mug to crack. 
  • Avoid crowding too much food on ceramic plates to heat food. 
  • Heat one type of food at a time in the microwave to avoid the texture and flavor mix.
  • Ensure you reheat food to the correct internal temperature of 165°F “(74°C)”.
  • You need to avoid microwaving cold ceramic plates or mugs. Because if you take ceramic plates directly from the fridge and put them in the microwave, they can explode or break. So ceramic plates need to be brought to room temperature first, then placed in the microwave.

How Long Can You Microwave Ceramic Plates?

Generally, the duration of ceramic plate microwaving is determined by the material used to make the ceramic product. However, if the ceramic plate is made of a porous material that absorbs more than 10% water of its weight, it cannot be microwaved for more than one minute. 

On the other hand, if the ceramic plate is made of pure clay, which absorbs water less than 2% of its weight, then you can microwave them for a bit more without risk. 

Why Are Some Ceramic Plates Not Microwave Safe?

Below are some reasons why some ceramic plates are not microwave safe.

  • Some types of ceramic plates are designed with metal trim, which is unsuitable for use in microwaves because they get very hot in the microwave. 
  • Colors on ceramic plates are not microwave safe. Because the color on the ceramic plate absorbs the heat quickly in the microwave; generally, dark colors contain manganese (a metal kind), and microwaves interact with these metals. 
  • Microwaves contact the food’s water molecules to warm them, and ceramic pottery has no water to absorb microwaves. However, some ceramic plates may contain minerals due to the manufacturing process. 
  • If a ceramic plate contains too many minerals, then the ceramic plate will become very warm in the microwave. Which are not microwave safe. 
  • Ceramic plates made of low-refined clay are porous at less temperature. Which are not safe for use in the microwave. 
  • Also, ceramic plates with glaze are unsafe for microwave use.

Why Did My Ceramic Plate Crack in the Microwave?

  • If the microwave is too powerful or set at too high a temperature, it can cause cracks in your ceramic plate. 
  • Also, glazes with ceramic can sometimes crack at high temperatures. 
  • Ceramic plates that are not labeled microwave-safe may crack when used in the microwave.
  • Also, some cheap or poorly made ceramic plates not fired at the accurate temperature can crack.

What Material Cannot Be Used in Microwaves?

Below are some materials that cannot be used in the microwave:

  • Styrofoam
  • Anything with stainless steel or metal
  • Plastic containers and plastic bags
  • Aluminum Foil
  • Water 
  • Takeout Containers
  • Paper Bags
  • Travel Mugs
  • Chinese Takeout Boxes
  • Lidless Containers

Will Ceramic Break in Boiling Water?

No, ceramic will not break in boiling water. You can put boiling water in the ceramic. But sometimes, sudden temperature differences can break the mug. So, in this regard, you can keep a stainless steel spoon before pouring the water into the ceramic mug. Thus the spoon will protect the mug from cracking and exploding.

Final Verdict 

Are ceramic plates microwave safe? Or not? Hope this article has give you all the inquiry about this topic.

However, Stoneware ceramics are the most durable option than other types. Whatever the material you buy, choose the best quality, and before using, ensure its microwave-safety feature. Thus, you get hot food serving instant without plate damage.

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