ceramic surface prettiness by using oil spot glaze

Abstract

This research focuses on studying a type of ceramic glaze within a temperature range of (1260°C - 1270°C) according to Seger cone scale (9). This type is a glaze saturated with iron oxide, known among potters as 'oil spot glaze,' due to its visual effects that resemble oil bubbles on the surface of water.

The current research employs two types of techniques to achieve one layer or two lavers oil-spot glaze effects.  The experimental methodology was adopted, involving the study and preparation of chemical formulations using locally available raw materials.  These formulations were applied to two types of clay bodies: a local clay and a chinses porcelain clay, this approach aimed to compare the behavior and results of the glazes based on the differences in the ceramic body type. The research also investigates the proportions and of iron oxide added to the composition and their effect on the optical properties of the glazed surface – specifically the color, texture, and gloss level – with the goal of achieving optimal results.

 The results indicated that both glaze type and the hematite content directly influenced the visual and textural properties of the glazed surfaces on the two-clay body substrate.