Crystallization in glaze is a decorative phenomenon that occurs during firing, where certain components of the glaze, such as zinc oxide, form visible crystals on the surface of the piece. This process occurs mainly during the cooling stage, when the molten glaze begins to solidify and the crystals develop into unique patterns. Crystalline glazes are highly prized in artistic ceramics because of their technical complexity and the visual effects they produce, such as stains, streaks or star shapes.
Crystal formation requires rigorous control of the firing cycle, especially temperature and cooling time. This level of precision makes working with crystalline glazes a challenge, but also an opportunity to explore unique decorative effects.
Interesting Fact
Crystalline glazes began to become popular in Europe at the beginning of the 20th century, when ceramists were looking for new, more experimental forms of decoration. Each piece with crystalline glaze is unique, as the arrangement and size of the crystals are never exactly repeated.
Helpful Tip
Use refractory supports under crystalline glazes, as crystalline glazes tend to become very fluid during firing. Conduct tests on small pieces before applying crystalline glazes on large projects and carefully follow the manufacturer's recommendations for consistent results.
