Stained glass: materials, techniques, history and contemporary uses

Materials and manufacturing

Traditional stained glass begins with coloured sheet glass made by mixing small amounts of metal compounds into silica melt. The separate pieces are cut to shape and joined with lead cames, a technique described in many craft manuals (lead). Painters add fine detail using vitreous paints and silver stain; the latter creates yellow tones by a surface reaction in the kiln (yellow stain). Where painted colours are fused permanently, the process is fired in a kiln (kiln-firing).

Common colourants

The palette of stained glass depends on metal additives. Typical examples include:

• Copper compounds produce greens and, under particular conditions, deep reds.
• Gold in extremely small quantities yields ruby red.
• Silver (often introduced as silver nitrate) can give warm yellows to reds.
• Cobalt produces intense blue.
• Manganese dioxide and iron(II) oxide create a range of greens and blue-greens.
• Chromium can be used for deep greens.

Design, assembly and types

Designers may work from cartoons (full-scale drawings) and translate those into glass shapes. The pieces are fitted together with lead cames and soldered at joints; once rigid, the panel is waterproofed and placed in a supporting structure. Two broad categories are traditional leaded stained glass, where the colour is integral to the glass, and painted or flashed glass, where details or surface colours are applied and fused onto a clear or differently coloured base.

History and cultural use

Stained glass has been prominent in religious architecture in Europe since the medieval period, serving both decorative and didactic functions; for its association with Christian iconography see Christian art. From the 19th century onward the medium was revived and adapted by artists and architects, and in the 20th century movements such as De Stijl explored abstraction in glass (De Stijl example and modern art in glass). Stained glass also appears in civic and domestic settings, and contemporary makers often call their work art glass (art glass).

Uses, conservation and notable facts

Beyond windows, stained glass is used in skylights, room dividers and decorative objects. Conservation is an active field: historic panels may suffer from lead fatigue, corrosion, and glass weathering; conservators stabilize, repair, or replicate panes. Notable non-traditional examples include dynamic figurative panels such as that at Dryden High School, often referenced as The Bald Eagle. For more technical or historical resources consult specialist publications and institutional collections (glass, firing techniques).

Stained glass remains a living craft and an expressive medium: its combination of light, colour and structural technique continues to attract artists, conservators, architects and collectors worldwide.