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17-25 October 2026

Fibre Fever!

Research into alternative materials for existing products, focusing on locally sourced natural fibres and binders from the Netherlands.

Hosted by Jack Brandsma

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This project is part of
Occasion

Entrance fee

Free access

Accessibility

Toilets available
Partially wheelchair accessible
Wheelchair friendly toilet available

Opening hours

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prototypes of biobased versions of Major Tom lamps
prototypes of biobased versions of Major Tom lamps
Jelle de Groot
In the Ad Hoc Collective’s ‘Occasion’ presentation, Jack showcases various results of his material research, highlighting both handmade, unique lamps and mass-produced lamps made from new bioplastics.

Replacement of replacement materials

When new materials are introduced, they are initially often used as replacements. Replacing materials with new successors is a practice that has existed throughout history and usually represents an improvement.
For an interior design project in 2003, Jack created a plastic redesign of a discarded industrial metal lamp. The material added a new dimension to the iconic shape, allowing it to stand out more thanks to the translucency. Additionally, the added rim opened up possibilities for new color combinations. The colorful Major Tom collection remains available today, including at the Piet Hein Eek shop.
We now view these fossil-based plastics somewhat differently. In his materials research, Jack is replacing the fossil-based materials in his existing products with bio-based alternatives. He reuses his own concepts and existing molds to gain insight into the possibilities and limitations of specific fibre materials. This involves natural fibres—such as hemp and miscanthus—that are either combined with a natural binder like potato starch or used as additives in new bioplastics.

Scale up

During DDW 2025, Jack presented a series of experiments and prototypes at Piet Hein Eek’s shop, marking the culmination of a year filled with presentations—including at Object, Material District, Milan, and Design Passage, as well as a fine exhibition at Museum de Fundatie. Following this, it was time to focus on the actual production and delivery of products—an area that has seen significant progress this year. It is now possible to manufacture product series using the new bioplastics, and the first interior projects have already been delivered.
A challenge for anyone working with bio-based materials is ensuring their availability and consistent quality; the season in which the materials are produced makes a significant difference. It should become the new normal that not everything is available at all times, but rather only during specific periods. We do not keep bioplastics in stock; instead, we have them produced to specification in 1,000 kg batches—essentially a stack of sheets. This means there is still a need to establish routines to ensure a consistent product, but we are learning as we go.
At the moment, there is stock available of the Bio Major Tom ø380 diffuser.

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MT380 diffuser biobased, switched off
MT380 diffuser biobased, switched off
Jelle de Groot
MT380 diffuser biobased, switched on
MT380 diffuser biobased, switched on
Jelle de Groot
MT380 diffuser biobased, detail
MT380 diffuser biobased, detail
Jelle de Groot

About Jack Brandsma

Jack Brandsma is a product designer and interior architect; he operates a partnership with Françoise de Thouars under the name Een paar ontwerpers v.o.f. and works in the Groningen region. Although Jack spent many years as a lecturer at Minerva Academy, he now focuses entirely on his own practice.