Composition of Various Percentages of Terracotta Clay as Colourant Glaze

• Published in: ENVIRONMENT-BEHAVIOUR PROCEEDINGS JOURNAL
• Main Authors: Suman, Siti Norhashimah; Anwar, Rusmadiah; Awang, Nor Nazida; Ayob, Salwa
• Format: Proceedings Paper
• Language: English
• Published: E-IPH LTD UK 2023
• Subjects: Environmental Sciences & Ecology
• Online Access: https://www-webofscience-com.uitm.idm.oclc.org/wos/woscc/full-record/WOS:001146979100006

Terracotta is a type of clay that is highly valued for its mineral content. The minerals found in terracotta are commonly used to create pigments that are used to color ceramic bodies and glazes. Terracotta's natural minerals make it unique when compared to commercially available colors. In this study, researchers explored the possibility of using locally sourced terracotta clay in transparent glaze formulations. The team used a variety of experimental methods, including examining the percentage of clay powder, X-ray diffraction, X-ray fluorescence tests, and scanning electron microscope analysis (SEM) to study the clay's morphology and structure. By adding terracotta clay powder in different proportions (ranging from 20 to 50%), the glaze became translucent. The resulting colors were glossy, smooth, and creamy, with no defects, as confirmed by visual inspection after the samples were applied to porcelain and fired at gloss temperatures (1200 degrees C). Keywords: Terracotta, colorant, glaze, percentage