Design Blueprint: Carbon Ink Loading

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24121464): This paper addresses a practical question in viscosity: a serviceable black ink can be made almost anywhere from carbon pigment, water, a binder and a preservative, and recipes circulate freely. Using a self-contained computation from stated assumptions, the study evaluates the options across the range a small operation ordinarily meets and identifies the point at which the balance of cost, quality and material use changes. The headline findings are that lowest loading meeting od 1p2 is 6; od at that loading is 1.2; settling days at that loading is 113; od at 20g is 1.83; settling days at 20g Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.