What’s the story behind the glaze on this ceramic craft sculpture—it’s so vibrant?

Oh, I’m so glad you noticed that vibrant finish! The story behind this glaze is actually a mix of chemistry, patience, and a little bit of kiln magic. Let me break it down.

First, I start with a base glaze—a suspension of silica, feldspar, and clay in water. But the real color comes from metallic oxides. For that deep cobalt blue, I used cobalt oxide; the rich green comes from copper oxide, and that warm amber? Iron oxide. Each oxide behaves differently depending on temperature and atmosphere.

Then comes the layering. I applied three thin coats with a brush, letting each dry completely before the next. This builds up a smooth, even surface. But here’s the trick: I deliberately left some areas thicker and others thinner. That’s why you see subtle pooling and gradients—gravity does its work during firing.

The kiln is where the real transformation happens. I fired it to cone 6 (around 2,200°F) in an oxidation atmosphere. As the glaze melts, it flows like glass, interacting with the clay body and any oxides in the surrounding shelf. The tiny bubbles that form and then settle give it that depth—almost like looking into a gemstone.

And that glossy, almost wet-looking surface? That’s from the high quartz content in the recipe. I actually spent months tweaking this recipe—too much flux and it runs off the piece, too little and it dries matte. This perfect balance took about seven test tiles.

So every time you see that vibrant glaze, remember: it’s a snapshot of a 12-hour firing, a specific cooling curve, and the playful dance between chemistry and heat. It’s never the same twice—which is why I love it.