Ali, Mahammad Firoj, et al. “Copper Sulphate Saline Etching: An Approach of Nontoxic Printmaking in Contemporary Indian Art”. RESEARCH REVIEW International Journal of Multidisciplinary, vol. 11, no. 5, May 2026, pp. 252-69, https://doi.org/10.31305/rrijm.2026.v11.n05.026.