Bilgin, Mustafa, and Johannes Backhaus. “Development of an Irreversible Hydrochromic Ink for Smart Packaging: DOI 10.14622/JPMTR-2004”. Journal of Print and Media Technology Research 9, no. 3 (September 30, 2020): 137–143. Accessed April 25, 2024. https://jpmtr.org/index.php/journal/article/view/6.