John Wrenn

Raku is a Japanese word meaning “enjoyment” dating back to the 16th century. The art form embodies the word in both creative and aesthetic value.

My passion for pottery began in 1968 when I began my study of clay at University of Wisconsin-Stevens Point.

John Wrenn Raku Studio was founded in 1990. Today, I draw from these experiences to design and create decorative ceramic art. The spontaneity of the American-style Raku process allows for the combination of fire, clay and air.

“Copper Flash” Raku is created by applying a “copper matt” glaze to the bisque-fired clay. Each glazed piece is returned to the kiln until the proper temperature is reached. One by one, each vessel is removed from the kiln with tongs and immediately submerged in a container filled with combustible materials. (such as sawdust and/or shredded paper.)

The materials ignite, and something magical occurs. As the flames lick up against the vessels, they react with the copper matt glaze, producing colors that are nearly impossible to achieve with standard glazes.

The process is ended by putting a lid over the container at the proper time to extinguish the flames. The coloration and patterns come from the action of the flames, so no two Raku vessels will ever be alike!

My black and white pieces are achieved by polishing the clay surface, heating each piece in the kiln and removing them while they are red-hot. Strands of horsehair are applied to the surface to create patterns.