Juwairiah, Juwairiah. “Paper Opacity As a Key Parameter in the Design of Eco-Friendly Printed Packaging”. Proceeding International Conference on Religion, Science and Education 5 (May 16, 2026): 171–178. Accessed July 23, 2026. http://sunankalijaga.org/prosiding/index.php/icrse/article/view/1630.