Manufacturing function, not only form.
What the very first ancestor of the Star Trek replicator looks like, why heat was the wall, and the uncomfortably simple way we got past it.
FDM printers are by far the most popular and reliable, because nothing beats them in simplicity and programmability. If you can bend a string of material into a three-dimensional object, you can theoretically make almost anything.
FDM has one major problem: heat.
About 200 °C is fine for inert plastics. But proteins, enzymes and pharmaceuticals are mostly heat-sensitive, so FDM destroys the very thing you're trying to print. Functional matter never made it through the nozzle.
The filament carries its own thermal buffer.
Uncomfortably simple, and nobody had done it before us. The phase change protects the functional chemistry travelling through the printer.
Made, sold, first of their kind.
Printable soap
Consumer cleansing filament, now in its sixth generation and six colours. Sold through Timeplast.
Photovoltaic filament
The first printable material that generates electricity from light. Patent pending, co-owned by the two companies.
Fish Bait filament
Fishing bait carrying real shrimp meal through the nozzle intact: the first protein payload we shipped.
Promising but early examples. The next stage is the most complex, the one that matters most, and the one I'd love your help with.
Four fundamental spaces of chemistry, one machine.
Printing one protein isn't enough. Instead of testing every heat-labile material, we attack four spaces: volatility and oxidation, chemical degradation, loss of protein structure, loss of biological activity. If a test fails, the failure tells us exactly where the boundary is so we can engineer the next version.
Four materials, four ways to fail.
If a string of material can carry these four through a 3D printer and they still work afterward, that would be evidence that printing can preserve function, not only form.
Limonene (d-limonene): volatility and oxidation. Vitamin C (ascorbic acid): redox degradation and hydrolysis. Lactase: loss of folded structure. Nisin: loss of bioactivity requiring intact structure.
Each one tests the idea from a different direction. My paper sets out the test as a preregistration protocol: the method and the pass thresholds are fixed before any data exists, and the plan is for an independent lab to run it. There's no data yet.
My paper, Manufacturing Function, Not Only Form, fixes the test, the thresholds and the failure modes before any data exists. I'd rather find the flaws now than later.
If you see a weak point in the method, the chemistry or the logic, send it to manuel@stringcubed.com. With your permission, I'll credit the strongest critiques here.
- Credited critiques: none yet.
You figure out what you want. The Manifester figures out how to make it.
One compact machine. Multi-material cartridges. An AI that hears a request, designs the object, chooses the materials, determines the internal architecture and generates the manufacturing instructions. Speak almost any object into reality.
Preserve
Molecules that already exist, carried through intact.
Synthesize
Chemistry modules: polymer synthesis, advanced processing, new material classes.
Self-replicate
Perhaps the ability for the machine to print itself.
Every object you don't ship is mass you don't launch.
Instead of packing a warehouse of every conceivable spare part, you bring a manufacturing platform and feedstock, with the potential of using Martian materials to manufacture "Earth" objects.