The idea that started this project is a big one: cutting down on waste and exploring what circular building could look like. Instead of a spool of filament, the material here is a bio composite paste made from wood dust, water, and an organic binder, completely free of plastic and non toxic. Waste streams like wood, coffee grounds, and hemp all feed into the mix, which fits that reuse goal nicely.
The setup itself is interesting. The paste currently runs through a WASP 2040 clay printer, and for larger scale prints the maker moves to a robotic arm. The nozzle is FDM printed, so it is a printable part pushing a printable material. The real standout choice is the non-planar approach: the nozzle works in the negative z-direction, letting the maker steer the print direction to follow the material's stress flow. Aligning layers with how a part actually carries load seems like a smart way to get more out of a soft, low impact material.
A few process details stand out too. There is no heating involved anywhere in the process, which keeps energy consumption and carbon emissions down. Hardening only happens after production, so the paste stays soft and wettish beforehand, and anything from a failed print can be scooped up and reused instead of binned. Current uses are decoration, vases, and test trials.
It is not all solved yet. The nozzle scrapes over printed material on slopes, and the maker plans to tackle that nozzle awareness in an update. The dried material is also durable enough for outdoor use but brittle enough that parts can chip off, though coated versions last longer. And the first prints show no degradation in the test solutions, so how it eventually breaks down still feels open.