What Is Causing Blue Spots On Crackle Ceramic Vases

The cause of crazing is the glaze being put under too much tension.

What is causing blue spots on crackle ceramic vases.

Use as a vase to display single stems or as a decorative piece on its own. Bacteria stains are more likely to occur on earthenware or stoneware type pottery due to the ceramic higher porosity level allowing the moisture to penetrate deeper and stay wet creating perfect enjoyment for bacteria to flourish. This decorative element changed a lot over the centuries. The tension happens when the glaze contracts more than the clay body does when cooling after being in the kiln.

High fire ceramic such as porcelain which has almost no porosity will less likely stain. Celadon is a term for pottery denoting both wares glazed in the jade green celadon color also known as greenware the term specialists now tend to use and a type of transparent glaze often with small cracks that was first used on greenware but later used on other porcelains celadon originated in china though the term is purely european and notable kilns such as the longquan kiln in. Iron residue contained in the clay moves slowly to the surface of the ceramic body over a long period of time forming small rust spots. There are several options to try at home for crazing repair.

The stoneware vase features a crackle glaze for a subtle distressed look which complements the matte finish stone bottom beautifully. Measures 6 5 h x 4 75 w. A characteristic of 15th century blue and white porcelain for example was the so called heaped and piled effect in which the cobalt blue underglaze was concentrated in certain areas bubbling through the surface of the glaze and turning a deep blue black.