The interesting difference between casting and printing is not how the piece gets made. It is which pieces can exist at all.
Every making process carries a set of rules about what it will and won't permit, and those rules end up written into the finished object whether the maker intended it or not. Learn to read them and you can usually tell how something was made by looking at it.
A cast piece begins as a pattern, and the pattern has to be removed from a mold that has to come apart. That single requirement propagates through everything.
No undercuts, because the mold would lock. No fully enclosed voids, because nothing could get in to form them. Thin elements must stay thick enough to let molten metal flow through and to survive being finished by hand afterwards. And because a mold is a fixed cost, casting pushes constantly toward making many identical things from it.
None of this is a deficiency. It is a grammar, and centuries of extraordinary work have been made inside it. But it is a grammar, and it shows.
Almost nothing, which takes some getting used to.
The piece forms inside loose powder that supports it from every direction, so there is no mold to withdraw and no support structure to remove. Undercuts are irrelevant. Enclosed voids are ordinary. Two elements can be printed already interlocked, having never been assembled, because they were formed in place around each other.
There is no tooling, so no fixed cost to amortize. One piece costs what one piece costs, and a design that will only ever exist a handful of times is no less viable than one made a thousand times.
What sintering asks in return: a minimum wall thickness, an awareness that surfaces will be matte rather than polished, and the knowledge that anything fully enclosed will contain trapped powder unless there is a way to get it out.
When the constraints move, the questions move with them.
Designing for casting, a persistent question is how to achieve an effect within what a mold will release. Designing for sintering, that question disappears and a different one takes its place: what should this form do, given that it can do almost anything?
That turns out to be harder. Constraints are generative — they narrow the field and make decisions for you. Their absence means every decision is yours, and it is entirely possible to make something that is technically impressive and says nothing at all.
The parametric work matters here. Building a form as a set of relationships rather than a fixed shape means the constraints become ones I choose and impose — a rule the form must follow — rather than ones the process hands me.
Neither, and the question mistakes what they are.
Cast silver has a density and a surface that printed nylon will never have, and it can be melted down and remade, which is its own kind of permanence. Sintered nylon holds geometry that casting cannot reach, at a weight that makes scale wearable.
I use both. The pieces in the nylon collection are there because they could not have been anything else.
See how these pieces are made, or browse the 3D printed collection.
All of these are collected on the 3D printed jewelry page.
