https://www.carolinefreesedesigns.com/
Couldn't find photos of the ones with raised contours so here's a blurry one of the negative depression variant,
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Imprint Stamps

3D printed (FDM) stamps bearing insignias of several artists at CASA (Ames, IA).
Modeled (Fusion 360) and printed during the summer of 2018.

View Website
Available
Freelance, Moonlighting
Alex Schectman
Modeler/Developer Putnam Valley, NY