The rheological behavior of the prepolymer hydrogel composite slurries was assessed to evaluate their suitability for 3D printing applications, specifically regarding shear-thinning and yield stress, which are critical for extrusion-based and embedded printing. The slurries exhibited a shear-thinning (pseudoplastic) flow, where apparent viscosity decreased with increasing shear rate, as shown in Figure . This shear-thinning behavior is essential for extrusion-based 3D printing, as it allows for easy flow through a nozzle under applied pressure while maintaining shape fidelity once deposited. As the microparticle concentration exceeded 70%, the slurries transitioned to Bingham plastic behavior, showing both shear-thinning characteristics and measurable yield stress (Table ), which helps maintain structural stability in complex print geometries, essential for embedded 3D printing and ideal support bath.