porcelain capsule

November 1, 2021

In chemistry and biology laboratories, an accessory called porcelain capsule is used, which belongs to the classification of porcelain materials and is used for the sole purpose of heating all kinds of solutions to high temperatures.

What is it?

It is a container with a spout on one side and a hemispherical shape that is used to heat solutions to high temperatures. In most cases, it is used in order to evaporate the solvent in order to obtain a more concentrated solution. It is very useful for evaporating excess solvent in a solution.

They can come in a wide variety of shapes and sizes and can be found in capacities ranging from 10 ml for small solutions to 100 ml for larger volume solutions.


The porcelain capsule has a series of characteristics that it is necessary to know to fully understand its functions in a laboratory:

  • It is a hemispherical shaped container with a spout at one end.
  • Porcelain is used in these instruments because they are impervious to liquids, resist heat and can withstand any type of chemical substance.
  • They can contain solutions from 10 ml to 100 ml.
  • They are bright white.
  • They are made with high acidity potassium silicate, this allows them to be very resistant to the high temperatures to which they will be subjected.
  • Its bottom can be round, although you can also find flat bottoms.
  • Its size is very varied, but the most common is 10 cm and the largest is 34.5 cm.

What is it for?

This laboratory instrument is used to heat solutions to high temperatures in order to obtain mixtures or solutions with a high concentration of solute by evaporating excess solvent or to obtain different ashes for different laboratory tasks.

This means that a porcelain capsule is used to evaporate, melt and carbonize substances because they withstand high temperatures.

How is it used?

To use the porcelain capsule, simply place it on an asbestos grid and place a Bunsen burner under it. Then, you must adjust the flame to the required conditions and wait for the solvent to evaporate until it reaches the required levels.

This will allow you to reduce the solvent levels of the evaporated solution or to carbonize solutes or substances.

Keep in mind that the asbestos grid is a kind of metal mesh that is used between the Bunsen burner and a porcelain capsule or crucible to transmit heat evenly. That is why its use is absolutely necessary.

Another aspect that you should not overlook when finishing is to clean the instrument very well and let it dry well. Before using it, make sure it is completely dry to avoid disturbing the solution.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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