When it comes to ceramic firing, one thing you cannot overlook is the "kiln atmosphere". Today, Pottery Clay will introduce you to a method that many potters adore: Oxidation Firing
What is Oxidation?
Simply put, it's a firing process where sufficient or excess air/oxygen is present during combustion. This allows the fuel to burn completely, resulting in a "clean" kiln atmosphere, free from soot or residual gases that could affect your pieces.
The Science of Colors
The reason this firing method is so popular is the resulting color outcomes, which are completely different from Reduction Firing.
- Stable and predictable colors: With sufficient oxygen, the metal oxides that act as colorants in the clay and glaze are not stripped of oxygen during the firing process. This results in the true, natural color of that particular metal oxide.
- Clear and vivid colors: The resulting colors are bright, sharp, and true to expectation. This is ideal for those who seek consistency in their work or for mass production requiring uniform colors.
- Beautiful colors from metal oxides:
- Copper Oxide: In an oxidation atmosphere, it produces beautiful green hues, ranging from light green and turquoise to dark green.
- Iron Oxide: It yields warm tones like amber, brick brown, or rust red.
- Cobalt Oxide: It provides a stable, consistent, and sharp blue color.
Why choose Oxidation?
- Consistency: The results will have the most similar colors, whether fired together or in separate batches.
- Convenience: Electric kilns typically operate in this atmosphere naturally, making them easy to control.
- Suitable for beginners and professionals: Whether you are a beginner or a professional ceramicist, oxidation firing is a reliable choice to achieve excellent and planned results.