Bisqueware Ceramics Definition | The Chemistry Lurking Behind

Bisqueware
Unfinished clay or pottery is called Bisqueware

Definition of Bisqueware Ceramics

Unfinished clay or pottery is called Bisqueware. Bisqueware is clay that has been fired in a kiln for the first time. “Biscuit” or “bisc” is what potters commonly refer to as Bisqueware ceramic. Bisqueware is not in its final state. It needs to be fired again before it’s in its ultimate state.

At this stage, Bisqueware acts like a sponge. When dipped into a glaze, it will absorb water and be coated with a glaze. The longer you let the bisque piece soak in the glaze, the more water it will absorb until the piece is finally saturated. It is then fired again and becomes a ceramic material. Click here for more information on examples of ceramic materials.

Bisqueware is clay that has had its initial firing in a kiln. Bisqueware ceramic is usually referred to as “biscuit” or “bisc” by potters. Bisqueware isn’t quite finished. Before it reaches its final form, it must be fired once more. It is then burned one more, resulting in a ceramic body or it’s final form.

What’s The Difference Between Bisqueware And Greenware?

Bisque is a term used to designate a type of pottery known as bisqueware. It can also refer to a method of firing clay, such as a bisque firing. Before it is fired for glazing, bisque is sometimes referred to as ‘pre-firing’ pottery ware. Greenware refers to unfired pottery.

What is unfinished pottery and Greenware? To learn more read my article called: Greenware ceramics definition. What is a kiln? To learn more read my article called: What is a kiln used for?

What Is The Origin Of The Name Bisque Fire?

Did you know that potters use the phrase bisque fire to describe the first burning of clay? Clay is changed from raw Greenware clay to ceramic material during the bisque fire. A bisque fire produces ceramic ware that is firm and porous. That means it will absorb water if it becomes wet.

What Is The Composition Of Ceramic Bisque?

Ceramic bisque, often known as biscuit, refers to the first kiln firing of raw dried clay. Earthenware ceramics is a porous clay bisque burned at a low temperature of around cone 04-06, or about 1850 degrees Fahrenheit.

What Is The Chemistry Behind Bisque?

Bisque is the first time that the clay is fired which is unlike unfired clay which has never been fired. Sometimes, the clay matures at a temperature higher than the glaze. If this is the case, the firing of bisque may be higher at temperature with the firing of a lower temperature glaze. As always the clay objects should be bone-dry before firing and should not be cold to the touch, indicating that they are not yet dry enough to fire. Occasionally, the bisque fire is called biscuit firing.

Can Bisqueware Be Glazed Or Painted?

Bisqueware is similar to unglazed earthenware that requires glazing and fire in a kiln. It’s too porous and soaks up glaze quickly. That is why it must be cured before applying another layer of paint.

The bisque firing is in the low temperature range removes water and carbon from the clay and thus fuses the clay pieces together. At this stage, you can no longer add water to the clay and reform the piece. The shape of the clay now has a set shape. The end result is the clay piece is hard, but it is also porous and able to absorb a small amount of water from a glaze solution. What this does is allows the glaze to adhere to the clay. Once this has been done the clay piece is ready for firing. This will melt and fuse the glaze together with the clay. The intermediate stage of bisque is when it’s intended to be glazed.

Is Bisque A Color That You Can See?

Biscuit porcelain, also known as bisque porcelain or bisque, is an unglazed, white porcelain that has been processed as a finished product and has a matte appearance and feel. It was commonly employed in European ceramics, mostly for sculptural and decorative artifacts that were not intended for use as tableware and hence did not require a protective glaze.

What Is Porcelain Bisque?

White unglazed porcelain is known as porcelain bisque or bisque. It is common in European pottery because soft marble has a comparable appearance. It has a matte texture and surface.

Biscuit porcelain, also known as bisque porcelain or bisque, is an unglazed, white porcelain that has been processed as a finished product and has a matte appearance and feel. It was commonly employed in European ceramics, mostly for sculptural and decorative artifacts that were not intended for use as tableware and hence did not require a protective glaze.

The Bisque Is Now In It’s Final State

Looks a lot different now. Comparing the top image to this one the bisque is now in it’s final state and look much better. The brown and red colors really pop and add visual interest to the ceramic wall decor. Firing in the kiln and adding a little glaze makes a big difference.

Bisqueware was fired and now is in it's final form
Bisqueware was fired and now is in it’s final form

Why Is Bisque Porcelain So Popular If It Isn’t Finished Or Complete?

This is a question I often get asked. It is desired because the artist knows he or she has passed the first stage, the first firing. The first test if you will. And it is very important because many things can go wrong during the first firing. In my opinion, it is the most critical stage because the clay is still full of water and is very susceptible to breakage. Just to recap, Bisqueware is artwork that has been fired once in the kiln and thus has undergone a ceramic change. This a chemical change where clay becomes ceramic. And as you know can never be re-used or returned back to its former state of Greenware. Bisqueware is still porous and therefore ready for glazing.

Clay has a mind of its own and has to be persuaded to conform to the artist’s shape. This technique is called compressing where the artist applies pressure to the clay achieving the desired results. But many times the clay fights back and does not conform to the shape. The result usually manifests during the first firing and the clay shows the artist who is boss by craking or braking. The artist has to know how far he or she can push the clay especially in vulnerable areas that are susceptible to cracking or problems. By applying pressure to the clay the artist causes the clay to be denser in that area.

So, at this point, the artist is very happy that his or her artwork is still intact and ready for the next stage where more glaze can be applied and that’s why it’s most desirable. I hope that answers your question and thanks for asking.

A ceramic artist is someone who produces ceramic objects or artwork. A ceramic artist is sometimes known as a ceramist. Someone who works with clay is referred to as a ceramicist, sculptor, potter, or simply artist. Ceramics are clay materials that, when fired, permanently alter their properties.