Aqueous transparent ceramic YAG slurry with high solids loading up to 52 vol.% is proposed in this work for 3D direct ink writing. Celluloses are readily adjusted the design enhance plasticity, through which both printability of slurries and optical quality ceramics considerably improved. We demonstrate that in-line transmittance at 1064 nm a 1.2-mm-thick can approach about 81.0%. This research...