If you’ve ever finished shaping a bowl in class and wondered what happens to it next, you’re not alone. During pottery classes in Abu Dhabi, many of our students ask us this same question. The truth is, the shaping part is just the beginning. Firing is what turns soft, fragile clay into something you can actually use every day. Clay looks solid when you’re working with it, but it’s still full of moisture and loosely held together. Without firing, it would crumble, crack, or dissolve the moment it got wet again. Firing changes all of that at a molecular level.
Why Pottery Is Fired: The Science Behind Turning Clay into Ceramic
Clay is basically made up of tiny particles sitting close together, but they’re not actually bonded to each other chemically. So, when you’re shaping a piece, all you’re really doing is arranging those particles into whatever form you want. It’s the heat that locks everything into place for good. During firing, the kiln pushes the clay up to extremely high temperatures, and that’s what triggers a chemical change called vitrification. Basically, the clay particles fuse together and turn hard, stable, and resistant to water. Once that happens, there’s no going back. That’s exactly why pottery gets fired before it ever becomes something you can actually use, whether that’s a mug, a plate, or just a decorative piece sitting on a shelf. Skip that step, and whatever you created stays fragile forever. It might look done on the outside, but it wouldn’t hold up to daily use, and it wouldn’t survive a cup of hot tea.
What Happens Inside the Kiln During Pottery Firing?
A kiln isn’t just some hot oven sitting in the corner. It’s a carefully controlled environment where the temperature climbs gradually, holds steady for a while, and then cools back down in stages. Skip or rush any part of that, and you risk pieces cracking or even exploding from trapped steam. In the early stages, whatever water’s still left in the clay evaporates out slowly. As the temperature keeps climbing, the clay body starts to harden and shrink just a bit. That’s completely normal as part of the pottery kiln firing process, and it’s actually why your finished piece ends up looking a little smaller than it did when you first shaped it. Our team keeps a close eye on this for every batch that comes through the studio. Even a small shift in temperature can change the outcome, which is exactly why experience matters so much here.
Bisque Firing vs Glaze Firing: What’s the Difference?
Most ceramic pieces go through two separate firings, and each one does something different. Once you understand that, it makes a lot more sense why the whole process takes time and can’t really be rushed Bisque firing comes first. It hardens the clay into a stable, porous material that’s safe to handle, paint, and glaze. At this point, the piece has some strength to it but is still a bit absorbent. Glaze firing happens after the glaze goes on. This second round in the kiln melts that glaze into a smooth, glass-like coating that seals the whole surface. It’s also where pottery actually gets its color, its shine, and its resistance to water. Not every ceramic piece needs a glaze firing. The second firing is necessary when the piece is intended to have a fired glaze coating, but some ceramics are finished after bisque firing.
However, unglazed pieces may remain porous and are generally not suitable for everyday food use, especially when they haven’t been fired to a vitrified, non-porous state.
Why Temperature and Timing Matter in the Pottery Kiln Firing Process
Every type of clay has an ideal firing temperature, and going too high or too low creates problems. Underfired pieces stay weak and porous. Overfired pieces can warp, bubble, or even collapse inside the kiln. Timing matters just as much as temperature. Clay needs time to heat evenly all the way through, not just on the surface. Cooling has to happen gradually too, since sudden temperature changes can cause cracking, even after the piece looks completely finished. This is one of the biggest reasons the stages of ceramic firing require real expertise. It’s not something you can rush or guess your way through, especially with larger or more detailed pieces.
Wedging Clay: The First Step Before Firing Even Begins
Before any piece reaches the kiln, it starts with wedging. When you wedge clay, you’re working air out of it. Trapped air pockets are one of the most common reasons pottery cracks or explodes during firing. Wedging removes those air bubbles and creates an even, consistent texture throughout the clay. It also gets rid of any hard or soft spots, so the clay behaves predictably once it’s shaped. We teach wedging to students who join our pottery classes in Abu Dhabi. It might seem like a small step, but it sets the foundation for everything that happens later, including a safe and successful firing.
How Abu Dhabi Pottery Guides You Through Every Stage of Ceramic Firing
We’re proud to be the UAE’s first-ever modern pottery studio. Every session at our studio is a Master Potter guided session, led by Master Potter Homa Farley and her trained team of pottery teachers. You’re never left guessing what happens after you shape your piece. Master Potter Homa Farley was recently named one of the noted 69 Glasgow School of Art Alumni. Her pieces of pottery are incredible artworks, and they’re on permanent exhibit in three museums, which says a lot about the level of quality behind every technique she teaches, including how she guides students. We’re also honored to be recognized as one of the UAE’s official Urban Treasures by the Department of Culture and Tourism – Abu Dhabi. It’s a reflection of the role our studio plays in the community, and of the care that goes into every class we run, firing included. Students often tell us this is the part that finally makes pottery “click” for them, because they get to see the whole process, not just the fun shaping stage. Our studio also welcomes international students who come to create pottery with us for short and long periods, from places like the USA, France, Oman, Saudi Arabia, Kuwait, the UK, and India. Some are even pottery and ceramics university students completing part of their professional training here.
If you’re looking for pottery classes in Abu Dhabi where the full process is explained clearly and taught properly, book a pottery class slot now.
Frequently Asked Questions
How long does the pottery firing process usually take?
A full firing cycle can run anywhere from a few hours to over a full day, depending on the size of the kiln and what type of clay you’re working with. That time covers gradual heating, holding steady at peak temperature, and then a slow cooldown afterward. Rushing through any of those stages just raises the risk of cracked or damaged pieces, so patience really does matter here.
Can pottery be used without being glazed?
It can, yes. Bisque-fired pottery is still usable, but it stays porous and soaks up liquid pretty easily. Glazing is what actually seals the surface, making pieces waterproof, food-safe, and much easier to clean. For anything functional you’re planning to use daily, like a mug or a bowl, you’ll generally want to go through glaze firing to make it practical.
Why do some pottery pieces crack during firing?
Cracking usually comes down to trapped air, uneven wall thickness, or firing that moves along too fast. Air bubbles left over from poor wedging are a pretty common culprit, and sudden temperature swings during heating or cooling don’t help either. Taking the time to prepare properly and keeping the kiln process controlled cuts that risk down significantly.
Is firing the same for every type of clay?
Not at all. Different clay bodies come with their own ideal firing temperatures and schedules. Stoneware, earthenware, and porcelain all behave pretty differently once they’re in the kiln, so each one needs its own specific temperature range. That’s part of why it’s worth understanding your clay type before you even get started with firing.
Do beginners need to understand firing before taking a pottery class?
Not at all. Beginners start with hand-building techniques and they don’t need to understand the firing process before taking a pottery class. As their skills improve, they learn about firing as part of the class experience over time as they move to intermediate and advanced classes. A good instructor explains each stage as you go, so you understand what’s happening to your piece from start to finish.
Homa was born in Tehran, Iran where she spent her childhood and teenage years. She has lived in the UK, and currently resides between Spain and the United Arab Emirates.
