In a Helsinki lab, a team is baking something that is not cake — even though their general manager, Johanna Normiala, describes it that way. "We take the lignin, we create a kind of dough that we bake like a cake, and in the end we get a hard, resistant, durable material but which is lightweight," she says. That "dough" is made from lignin, the woody byproduct that paper mills and timber companies usually toss aside and burn for energy. A Finnish startup called Elementic decided to treat this waste as a main ingredient instead — and the result is a wall tile called MO6 that claims to lock carbon away for thousands of years.
Here is why that matters. Most building materials are "carbon positive": they emit more carbon than they store. Wood is often held up as the exception, because trees soak up carbon as they grow and some of it stays locked in the lumber after harvest. But wood has a weakness — it burns, it decays, and eventually it releases its carbon back into the air. MO6 tries to fix that last problem. The tile is 90% carbon by chemistry and, according to Elementic, stores roughly 2.4 kilograms of atmospheric carbon dioxide for every kilogram of material — about double the carbon storage of wood. Unlike wood, it does not decay, so that carbon could stay trapped for potentially thousands of years.
The manufacturing process is patented and famously secretive. What Elementic will share is the general shape: lignin is processed in a bioreactor to strip out impurities, including oxygen, before being shaped and baked. The finished tile is fire-resistant, durable, lightweight, and off-black with a rough, dramatic texture. Its thermal and acoustic properties are comparable to wood, and the company expects them to improve as the process develops.
Elementic is deliberately not marketing this as a green product. Instead, it launched a premium design collection called MO6 Eternal on September 2 at Habitare, a design trade fair in Helsinki during Helsinki Design Week. The thinking is simple: a product sold on environmental credentials reaches only one kind of buyer, but a product sold as a design choice reaches architects, hotel developers, and interior designers who might never have been looking for sustainable materials. The company is already delivering tiles to projects, including a spa under construction in Paris. "The focused interest are in the area of hotels, restaurants," Normiala said.
For now, MO6 is sold for dry indoor spaces only, in rough or smooth finishes. But the company's next ambition is bricks — a shift from interior finish to structural building material that would open up far larger applications. "There's a huge potential for that, not only interior part, which is now our first business, but in future in a much larger scale in building," Normiala said.
The secrecy of the patented process raises a question sustainability researchers are asking more often: as green materials become commercially valuable, how much knowledge gets locked behind intellectual property instead of shared openly? It is a tension the industry has not yet resolved. For now, Elementic has a product on the market and a claim that could reshape how architects think about the climate impact of the materials they choose.