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This study examines the effects of nanoparticle densifiers added to printing liquid on the mechanical performance and manufacturability of ceramics made using binder jetting. “Green” alumina samples were synthesized with filler particles of average particle size 40 μm embedded with nanoparticles of average size of 50 nm suspended in the printing liquid with varying concentration of 0–15 wt%. Samples were characterized for density, porosity, compressive strength, and printing liquid penetration depth in the filler powder layer assessed using surface tension testing. Results showed that the presence of the nanoparticle had a marked effect on the physical and mechanical properties of the samples whose relative density increased by about 30%. MicroCT imaging of the samples showed a decrease in interparticle pores with an addition of 15 wt% alumina nanoparticles. Compressive strength improved by 743 …