Armchair 400 Tank

ALVAR AALTO, 1936

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The Tank Armchair, designed by Alvar Aalto in 1936 for the Milan Triennale, marked a turning point in his design approach. More robust and voluminous than his previous works, it stands out for its wide, curved birch armrests and springy cantilevered frame, ensuring both comfort and flexibility.

Its name comes from its solid, imposing form, while its success at the Triennale cemented Aalto’s international reputation. Produced by Artek since 1935, the Tank Armchair remains a modern design icon, celebrated for its versatile upholstery options and timeless appeal.

Design Approach, Materials

As previously mentioned, the Armchair 400, known as the Tank Armchair, represents a significant evolution in Alvar Aalto’s journey toward a more comfortable and humanistic functionalism and modernism. Designed in 1936 for the Milan Triennale, its voluminous and robust form marks a clear departure from Aalto’s earlier, lighter designs, such as the Stool 60 or the Paimio Chair. The chair features wide, sturdy support surfaces made from steam-bent birch lamella, contributing to its low center of gravity and imposing presence while maintaining an organic and airy quality. The seat and backrest, angled at approximately 120 degrees, provide a relaxed posture. The springy cantilevered frame ensures both comfort and flexibility. The upholstered seat allows for experimentation with materials, including birch plywood, fabric, and leather, supported by zig-zag springs, PU foam, and polyester padding. One of the most iconic versions features a zebra-patterned upholstery.

ARTEK AND THE SUCCESS OF AALTO'S FURNITURE

Artek played a very important role in the success and long-standing popularity of the Tank Armchair. Founded in 1935 by Alvar and Aino Aalto, Maire Gullichsen, and Nils-Gustav Hahl, Artek aimed not only to sell furniture but also to promote modern living and spread Nordic functionalism internationally.

The first Artek store, opened in Helsinki in 1936, became a key venue for showcasing Aalto’s work, including the Tank Armchair. Artek also organized international exhibitions, strengthening the reputation of Aalto’s designs. The company managed both production and distribution, ensuring high-quality production, a key factor in the chair’s lasting success.

Since then, the Tank Armchair has become part of some of the world’s most prestigious design collections, including the MoMA in New York and many others.

Alvar Aalto

Alvar Aalto (1898-1976), Finnish designer and architect, revolutionized design with his bent wood technique. He is famous for the Paimio chair, designed in 1932, and the Savoy vase of 1936, which reflect an organic design inspired by nature. As the cofounder of Artek, Aalto integrated functionality and aesthetics, profoundly influencing modern and Scandinavian design.

Artek

Artek is a Finnish design company founded in 1935 by Alvar and Aino Aalto, Maire Gullichsen, and Nils-Gustav Hahl. Originally established to market Aalto’s furniture, it also aimed to promote modern living through exhibitions and education. Today, Artek continues to produce and distribute iconic designs with a strong architectural identity.

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