A Closer Look at the Aesthetics of Glaze
Color, sheen, translucency, texture. When developing glaze for a project, there are many qualities to consider that will affect the final look. To simplify the design process, experts in the Boston Valley Glaze Lab identify each glaze according to several categories. The following criteria assist them in customizing a formula that aligns with your description of the ideal glaze.
- Color – The visible expressions of hue, saturation, and tone of the glaze.
- Sheen – Defines the reflective nature of the glazed surface, ranging from matte to gloss.
- Translucency – The amount and diffusion of light that passes through a glaze, ranging from completely opaque to a clear finish.
- Texture –The tactile quality and visual play of the glazed surface, created through a variety of application methods.
Color
Vibrant – Pastel – Neutral
Architects and designers will most often start by requesting a color for their project; this is generally the first impression of any glazed surface. From intensely saturated hues to delicate pastel tones, or subtly tinted neutrals, our custom glaze lab offers a full spectrum of options for visual impact. Each glaze color is carefully formulated with consideration for how it will present in different light conditions, surface textures, and profile contours. Color is the base element of the aesthetic that helps designers to evoke emotion, recreate historical palettes, or establish a bold contemporary aesthetic.
Click here to explore popular custom colors in glaze. >
Multiple shades of jade green glaze brighten the tunnel pathway of Rathbone & Newman Passages.
Sheen
Matte – Satin – Gloss – Engobe
Sheen refers to the level of reflection and interaction with light from the glazed surface. A matte glaze absorbs light for a soft, understated look, while a gloss glaze reflects the light to create brilliance and dimension. Satin finishes offer a balanced alternative that create gentle highlights. Specialized finishes such as engobes have a hand-crafted quality with their opaque, slip-like coatings in earthy colors. Sheen plays a crucial role in both the tactile feel and visual perception of a façade.
See how sheen impacts terra cotta surface quality. >
The glossy red glaze on Rice University’s Cannady Hall causes light to reflect off the angled planes of its sawtooth façade.
Translucency
Opaque – Translucent – Transparent
Translucency governs how much the underlying clay body or texture shows through the glaze. Opaque glazes offer full coverage for a uniform presentation, ideal for bold color with visual continuity. Translucent and transparent glazes allow the color of the clay body to show through, introducing depth, layering, and subtle shifts in consistency — the result is dependent on the surface underneath. This characteristic adds complexity and richness to architectural applications, allowing for varied effects under changing lighting conditions, textured surfaces, and deep profiles.
Look at the effects of translucency in glaze. >
Iridescent green undertones of varied opacity give depth and complexity to the dark-glazed tiles of Willis Tower.
Texture
Metallic – Pulse – Crystalline – Layered – Speckling – Dot
Texture in glaze is expressed beyond the tactile feel of the terra cotta surface—it creates movement, depth, and material richness. Boston Valley glazes are produced in a wide range of unique textures, including smooth metallics, crystalized surfaces, layered effects, and intentional speckling. These textures result from a combination of glaze chemistry and artisanal application methods. Whether aiming for a refined finish or a more organic aesthetic, textured glazes add tactile and visual interest that elevate the architectural character of terra cotta.
Check out the variety of textures created by glaze. >
A subtle metallic glaze highlights the contours of 512 W 22nd Street’s dark façade.
Developing Glaze for Your Project
When selecting color for a glaze, physical reference is a useful tool. This reference can be a color swatch code, a printed image, or even physical objects. Boston Valley has prepared custom glazes to match samples of original architecture, PMS colors, photographs, and even unique items such as a jade bracelet and a mantel. Given that all monitors are not calibrated to the same standard — color presentation varies widely across device types and models — digitally sent files or images are not an accepted form of color representation when developing glaze.
Sample chips are often compared against physical reference materials when developing glaze formulas in the Boston Valley Glaze Lab.
During the process of glaze development, each formula undergoes a series of sample testing. Boston Valley’s Glaze Lab runs the formula through production firing to evaluate its final presentation. All glaze components react and move during firing process — glazes do not develop their final colors or attributes until post-firing. How the glaze reacts to its underlying through body, the form and texture of the profile units, and the kiln settings during manufacture are what truly makes glaze development a scientific and artistic process.
Any glaze adjustments made during development would require full reformulation with a new round of testing. These adjustments could include increasing or decreasing the sheen level of the glaze, saturation of color, or range of translucency.
Custom development of glazes requires careful formulation of components to achieve the desired look.
It should be noted that Boston Valley does not have a standard or pre-made glaze catalog — all our formulas are developed custom by the Research & Development team for every project request. Even previously created sample glazes must be custom formulated for production within the Boston Valley factory.
Time is necessary to develop a custom glaze – time to explore the varied characteristics at play to create the correct formula, and time to test the formula on similarly produced samples to achieve the desired design intent.
Representatives at Boston Valley can help you choose your custom glaze — we will review these aesthetic categories together to pinpoint the exact style you wish to achieve. Contact us today to get started on your next building project.
