Shrinkage The name already suggests that shrinkage refers to reduction of the size and volume of the pottery, and therefore it can be mistaken for contraction and expansion, making it seem like they’re rather similar. However, that’s not the case. While the other two examples are quite natural and happen while the piece undergoes some…
Salt glaze The term “salt glaze” got its name from the process of using salt in the kiln. Because of the involvement of salt, which naturally contains sodium, the process is also called sodium glazing or sodium firing, while the pieces created by this method are sometimes called “saltware”. Due to the heat, the salt…
Learn what a potter’s wheel does, why wheel throwing takes practice, and how the potter’s wheel fits into beginner pottery learning.
Porosity Porosity refers to the object’s ability to absorb water, which is done through capillary action. This is a serious concern when talking about pottery, as overtime it can weaken the body of the piece that is naturally made out of clay. This should be taken into account when looking for the right piece of…
Ceramic The word “ceramics” originates from the Greek word “keramos”. Keramos refers to the clay that potters use and it includes all of the products made with clay that use heat during their production phases. This use of heat during the production is what makes the clay products permanent. The term also has other usages,…
Learn what porcelain is, why it is strong and refined, how it differs from bone china, and why many potters find it challenging to work with.
Oxidation This is a term used in the ceramics industry to describe a process that occurs during the firing step. The kiln is opened to enable oxygen from the air to mix with the clay and glaze components. This is especially crucial in order to “burn off” the carbon and sulfur that naturally reside in…
Lead Many glaze formulas have traditionally used lead as a major element. Even though they can leach into liquids and meals, you should always remember this whenever you are choosing food-safe ceramics. The risk comes from the cumulative consequences of using common functional items continuously. Since most practical ware is fired to higher temperatures, lead,…
Learn what a kiln does in pottery, the most common kiln types, and why temperature and atmosphere matter for firing clay and glaze well.
Painting ceramic pieces can be an enjoyable and affordable way to give a new life to old home décor or create a unique gift for your loved one. The process for painting ceramic kitchenware or decorations is generally the same with a few slight nuances depending on the size of the projects. But what are…