Lead glaze — type of GLAZE that has been used since ancient times in ceramic production. It is made by combining lead oxide with other materials and applying it to the surface of pottery or tiles. The lead glaze creates a glassy, transparent coating that adds a glossy and decorative finish to the ceramic objects.

Lead glaze is highly poisonous in its unfired state. This means that before the glaze is fired in a kiln, it poses a significant health risk if it comes into contact with skin or is ingested.

Once the lead glaze is fired at high temperatures in a KILN, it undergoes a chemical transformation, becoming stable and safe for use. The firing process fuses the glaze onto the surface of the ceramic, creating a durable and attractive finish. It should be noted, however, that lead glaze may still present potential health risks if the ceramic is damaged, allowing direct contact with the glaze or ingestion of small particles.

Due to the potential health hazards associated with lead glaze, its use has become less common in contemporary ceramic production. Many countries have implemented regulations and guidelines to restrict or ban the use of lead-based glazes in certain applications, particularly those involving food or drink contact.