Star Blue™ Copper

Preweathered Copper Patina

Star Blue™ Copper is a premium surface patina on copper offered by A. Zahner Company. The custom copper sheet product provides a range of unique visual color textures on authentic copper surfaces.

Zahner began working with copper patination when the company was formed in the late nineteenth century. To get the aged copper look of ancient domes requires entire centuries of weathering in conditions that are neither to dry nor too humid. Zahner uses a technique that speeds up this process.

The custom patina can be used on a range of different wall paneling systems, roofing systems, and architectural accents, as well as art and sculpture projects of any scale. Patinas are often preferred over paints for their natural weathering and aging, a much desired trait compared with painted surfaces which deteriorate.

Photo of Columbus Museum of Art

Photograph of the Columbus Museum of Art, designed by DesignGroup in Ohio.
Photo by Jeremy Purser, © A. Zahner Co.

Blue Copper, Unlike Any Other Material

Zahner operationalized the Star Blue Patina on Copper for the Kansas City Star Production Facility in the early 2000's, the first large-scale application of Zahner's proprietary rapid-patination process.

The artistic patina has variation in tone and texture, an uncommon trait that is sought after in the architectural metals community. The development of stable patinas on copper requires a strong background in science, and an understanding of chemical compounds, various climates, and their atmospheric and local conditions.

Many of the Patinas developed, including the Star Blue patina, are perfected CEO/President L. William Zahner (pictured below).  Mr. Zahner is also an artist and used the Star Blue™ Patina on a sculptural commission for the Salvation Army entitled Hands of Man.

The Star Blue difference — The Problem with Verdigris

Verdigris refers to a chemical process applied to copper in order to create a blue-green color. Specifically, it references copper acetate, a pigment which develops as a reaction between copper and acetic acid.

The problem with verdigris patina standards, is that it can leave the material in a soluble state. Zahner patina technicians have mastered the process of taking verdigris to an insoluble state, ensuring that the patina is fused to the surface. This surface is called Star Blue, a proprietary rapid-patination process only offered by A. Zahner Company.

Sideview of the Kansas City Star Production Facility in Kansas City, Missouri.
Photo © A. Zahner Co.

Detail of the Kansas City Star Production Facility in Kansas City, Missouri.
Photo © A. Zahner Co.

The Kansas City Star Production Facility in Kansas City, Missouri.
Photo © A. Zahner Co.

Detail of the facade of the Kansas City Star Production Facility in Kansas City, Missouri.
Photo © A. Zahner Co.

Photographs of the process used in making the Hands of Man sculpture by L. William Zahner

Photographs of the process used in making the Hands of Man sculpture by L. William Zahner.
Photo © A. Zahner Company.

Detail of the Hands of Man sculpture by L. William Zahner

Detail of the Hands of Man sculpture by L. William Zahner.
Photo © A. Zahner Company.

university-of-toronto-missassago-canada-flynn

Students walking at dawn amidst the blue copper facade at UTM's Instructional Centre.
Photo © Lisa Logan, courtesy of Perkins + Will Architects.

university-of-toronto-exterior-detial

Detail of the exterior copper facade at the Instructional Centre at the UTM in Canada.
Photo © Lisa Logan, courtesy of Perkins + Will Architects.

university-toronto-mississauga-new-building

Students walk up and down the main staircase at the Instructional Centre at the UTM in Canada.
Photo © Lisa Logan, courtesy of Perkins + Will Architects.

Reilly Hoffman's Oculus sculpture.
Photo © A. Zahner Company.

Detailed view of Reilly Hoffman's Oculus sculpture.
Photo © A. Zahner Co.

Detailed view of Reilly Hoffman's Oculus sculpture.
Photo © A. Zahner Co.

Selection of Projects Produced with the Star Blue Patina on Copper

  • Columbus Museum of Art's Expansion, in Columbus, Ohio.
  • Instructional Centre at the University of Toronto Mississauga in Canada.
  • Oculus sculpture by artist Reilly Hoffman.
  • Kansas City Star Production Facility in Kansas City, Missouri.
  • Cyclone Sculpture by artist Steven Woodward
  • Hands of Man Sculpture by L. William Zahner
  • Board of Trade Heartland Harvest Public Artwork by Joel Marquardt
  • Books of Knowledge Public Artwork by Steven Woodward

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