Bauhaus Material Experiments: Why They Chose "Unadorned"

When the Bauhaus is said to have "rejected ornamentation," it is often misunderstood. It was not about wanting things to look simple, nor was it about following aesthetic trends. The Bauhaus rejected ornamentation out of a conviction that materials have their own inherent logic, and to conceal that logic was both dishonest and wasteful.
Where did this conviction come from, and how was it put into practice? We trace its origins from the field of material experimentation.

Experiments that began with glass from a junkyard

In the preliminary course (Vorkurs) that all Bauhaus students first attended, direct engagement with materials was the starting point of their education.
Josef Albers' experiments in the glass workshop were typical of this. Due to lack of funds, Albers would take students to the town's junkyard with bags and hammers to collect broken glass bottles. They would then reassemble them with wire and plaster, thoroughly exploring the transparency, layering, and interaction with light that glass possesses.
"Don't just teach the outward appearance of materials, but focus on their inner qualities"—Albers critically inherited Itten's methods in this way. Iron can be bent, glass transmits light, paper gains strength when folded. The core of Bauhaus design education lay in physically experiencing the "inner energy" of each material.

Loos's question—"Is ornament a crime?"

The "rejection of ornament" at the Bauhaus was ideologically anticipated by the Viennese architect Adolf Loos. In his 1913 essay "Ornament and Crime," Loos argued that ornament is a "crime" that makes useful objects obsolete. The labor of craftsmen spent on ornament becomes wasted the moment the object goes out of style. He claimed, "The evolution of culture is concomitant with the removal of ornament from useful objects."
Loos was not a Bauhaus teacher. Yet, his questions undoubtedly shaped the climate of German design thought in the 1920s. When the Bauhaus explained "why not to decorate," Loos's challenge was in the background.

Material Honesty—Concealing is Lying

One of the concepts systematized by the Bauhaus was "Materialgerechtigkeit" (material honesty). This principle states that materials should be treated in a way appropriate to their inherent properties, and their essence should not be altered.
Steel tubing should appear as steel tubing and not be covered with paint or carving to make it look like wood. Glass should be used to reveal the interior, not to obscure the structure. This idea fundamentally differed from Art Nouveau, which adorned material surfaces with botanical patterns, and from Arts and Crafts, which affirmed the traces of handcraft.
For the Bauhaus, concealing the essence of a material was not a matter of aesthetic choice, but a matter of honesty. And at the same time, it was also a matter of economic rationality. Undecorated products could reduce the cost of mass production, making them accessible to more people.

Breuer and the Steel Tube Chair—Born from a Bicycle Handlebar

One of the most striking manifestations of material honesty is the steel tube chair, commonly known as the "Wassily Chair," designed by Marcel Breuer in 1925.
That year, Breuer bought a bicycle for the first time. Strongly attracted by the lightweight yet strong steel tube frame, especially the shape of the bent handlebars, he began to wonder if he could "bend steel tubes to make a chair frame." The resulting prototype was a chair that deliberately exposed the steel tube structure.

Breuer himself described this chair as "my most extreme work—the least artistic, the most logical, and the most mechanical."
It demonstrated how the choice to "not decorate" could bring out the inherent beauty of a material, using the gleam and structural beauty of the steel tube as its own visual language, rather than concealing it. Kandinsky, who lived next door, admired the prototype, and the chair was named after him.

What De Stijl and Constructivism brought

Between 1921 and 1923, Theo van Doesburg, a central figure in the Dutch art movement "De Stijl," stayed in Weimar. Although Gropius refused to officially invite him to the Bauhaus, van Doesburg set up a studio right next to the Bauhaus and permeated the students with the ideas of Constructivism and De Stijl.
What De Stijl brought was the conviction that beauty could only be achieved through pure geometry and pure materials. Russian Constructivism added the idea that modern materials such as iron, glass, and concrete were the materials of the age. When these merged with the Bauhaus's material experiments, a "new aesthetic of materials" began to take shape.
The glass curtain wall of the Bauhaus building in Dessau (1926) is the crystallization of both Constructivism's faith in modern materials and De Stijl's open spatial composition.

"Undecorated" was a means, not an end

The point reached by the Bauhaus's material experiments is this: the exclusion of ornamentation was not the pursuit of aesthetic minimalism. It was an inevitable choice to honestly treat the inherent logic of materials, to align form with function, and to make products accessible to many through industrial production.
The luster of steel tubing, the transparency of glass, the cool reflection of nickel silver—these were not chosen as "substitutes for decoration," but were consciously used as the inherent visual language of the materials. The Bauhaus extended Louis Sullivan's maxim, "form follows function," to the dimension of materials.
ZACK's 18/10 stainless steel and brushed finishes also reflect the idea of not hiding the material, but allowing it to appear as it is. It's not about adding decoration, but about harmonizing the relationship between material, form, and function. This quiet attitude resonates somewhere with the "honesty to materials" that the Bauhaus continuously questioned.

Hero photo: Yuta SATO, 2010. All rights reserved. / Wassily Chair: Luistxo, CC BY-SA 4.0.

This article is part of the Genealogy of German Design | 100 Years of History Where Function and Beauty Met archive.