rigaree

A rigaree is a series of fine parallel grooves cut into the surface of glass, typically running across a raised band, collar, or tear (a thickened applied ring of glass). The grooves are created by rolling a metal wheel with ridges or fluting along the edge against the warm glass, leaving behind a regular pattern of indentations that catch light and add visual texture to an otherwise smooth surface.

The ridged wheel used to produce a rigaree has teeth or flutes running parallel to its circumference. As the wheel rotates and travels across the glass, each ridge presses into the surface simultaneously, creating evenly spaced grooves in a single pass. The spacing and depth of the grooves depend on the pitch of the wheel's ridges and the pressure applied. This method works best on raised elements where the wheel can sit squarely against the glass without tipping or binding.

Common locations and variations

Rigarees appear most frequently on the collars of decanters, the rims of drinking glasses, or the bands applied to bowls and vessels. Because they sit on raised or vertical surfaces, they are visible from multiple viewing angles and serve both functional and aesthetic purposes. The groove pattern creates a subtle visual break that defines the boundary between decorative and functional zones of the piece. On some work, double or triple parallel rigarees are applied to create more complex banding.

The wheel must be kept at the correct temperature and the glass must be in the right thermal state, warm enough to accept the impression without fracturing but not so hot that the grooves blur or collapse. Poor technique results in incomplete grooves, skipping, or uneven spacing. The term derives from the French rigaré, meaning channeled or grooved, and has been used in European glassmaking for centuries to describe this particular decorative technique.

Rigarees appear on both hand-blown and mold-blown glassware, from simple utility pieces to high-end tableware. Industrial production uses semi-automatic wheels mounted on fixed arms that descend onto the glass as it passes through. The technique remains largely unchanged in principle, though modern equipment offers better consistency and repeatability than hand-application methods.