The term semi-opaque in ceramics describes an optical quality of glazes or glazes that allows a certain degree of translucency, leaving part of the surface or underlying details visible, but in a softened manner. This effect lies between fully opaque and fully transparent glazes, offering a unique balance that brings out the texture and color of the pieces with subtlety.
Semi-opaque glazes are ideal for decorative pieces, as they soften the underlying colors and shapes, creating interesting visual effects. Depending on the formula and oxides used, they can produce matte or glossy finishes. In addition, they are often applied over colored clays or engobe decorations to obtain surprising and complex results.
Interesting Fact
The development of semi-opaque glazes was key in Islamic ceramics, where they were used to create decorative patterns on tiles and tableware. Semi-opaque glazes helped to soften geometric and floral details, giving them an ethereal appearance that integrated harmoniously with architectural designs.
Helpful Tip
Experiment with applying semi-opaque glazes over clays of contrasting colors to create depth effects and complex shades. If you are looking for more control over the level of opacity, adjust the proportion of opacifying oxides in the glaze mix and test before applying to final pieces.
