Sheet Glass

Learn how Sheet Glass is made
in KOG's Sheet Glass Studio

Use the Form on the left to browse our Sheet Glass Inventory.

Types of Sheet Glass

• Opal: Glass that is not transparent, although some sheets may contain relatively transparent areas.
• Streaky: Contains two or more colors mixed together and may or may not be transparent.
• Cathedral: Single color transparent glass.
• Opalume: Single color non-transparent glass

How is sheet glass different than stained glass?

For the uninitiated, we have to define our terms before describing our product and what makes it so great.  Colored glass and sheet glass are basically synonyms, but neither of these terms are perfectly synonymous with stained glass. 

Stained glass is, literally, stained glass.  It is glass that has been painted.  A powder is applied to transparent glass and then the product is kiln fired.  If you paint a pane of glass blue, and fire it, your end product is blue. 

But sheet glass is different.  A blue pane of sheet glass is literally blue—through and through. It produces a light, and an effect that is richer and more striking than stained glass and its color does not wear down with age, but remains as brilliant as the day it was made.  

More importantly, sheet glass can be exposed to incredibly high-temperatures, reshaped, and reformed while retaining its color. 

Stained glass is painted.  Sheet glass is created. 

At KOG we are not too bashful to advertise that our sheet glass is of a quality that is as good as, and usually better than, any glass manufacturer in the world.  We produce the best quality colored glass sheets in the United States, and we are the only art glass factory in the nation that manufactures glass sheet by hand. 

What makes our sheet glass different?

The color, clarity, texture and workability of our sheet glass is second to none.  The intensity of our sheet glass’s color derives from our hand-mixing techniques.  You just can’t get the same effect by mixing with a machine—otherwise we would have converted long ago!  We remain committed to hand-ladling and hand-mixing because it produces the best quality product.  Period. 

Due to the formulation of our colored glass sheets it is easier to cut and score and it breaks more cleanly and crisply, and as a result it is a pleasure for most craftsmen.  Clean-breaking glass allows craftsman to rely on our materials and their skills rather than relying on luck to achieve the forms that they want with a degree of precision.  Again the formulation that makes our sheet glass more workable is a result to our hand-crafted methodology.