French duo Ronan and Erwan Bouroullec have formed aluminium mesh into a chair that is intended to look worn over time.

The Stampa chair for Kettal is made entirely of aluminium incorporating various manufacturing techniques. It comprises a cup-shaped perforated shell that is connected to the seat and hydro-formed legs with an injection-moulded ring.

According to the Bouroullecs, the aim was to create "a chair that could assume the passage of time".

"When we started the collaboration with Kettal, our first idea was to make an aluminium chair that was both sturdy and delicate at same time," they said.

The perforated shell is made by punching and then shaping the metal sheets.

"This allowed us to create delicate shapes that recall textile sensations and are robust enough to stand the test of time – also in an outdoor environment," said the designers.

"Like a pair of leather boots, we wanted the chair to change organically with the use over time."

The chair comes in two versions – perforated or plain – and in powder-coated or anodised finishes. An additional seat cushion is also available.

Stampa made its debut on the Patricia Urquiola-designed Kettal stand at this year's Salone del Mobile in Milan, which took place last month.

Other recent projects by the Bouroullec brothers include a range of chairs and tables made using ancient iron-forging techniques for Magis, a furniture collection for Vitra, and a set of diamond-shaped coloured vases for Iittala.