Lal, B., Rahim, M. R. U., Bharti, P. K., & Rizvi, S. A. H. (2026). Optimizing the Hardness of 3D Printed Novel PETg-PLA Based Polymer Blend using RSM. International Research Journal of Multidisciplinary Technovation, 8(2), 267–279. https://doi.org/10.54392/irjmt26217