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Printability characterization of the 3 wt% alginate and 9 wt% methylcellulose (algMC) ink with the addition of 30 wt% and 50 wt% sand, respectively. (A) Filament collapse test (mean ± SD, n = 3). Scale bar = 10 mm. (B) Filament fusion test (mean ± SD, n = 5). Scale bar = 4 mm.
