Bilgin M, Backhaus J. Development of an irreversible hydrochromic ink for smart packaging: DOI 10.14622/JPMTR-2004. J. Print Media Technol. Res. [Internet]. 2020 Sep. 30 [cited 2024 Nov. 25];9(3):137-43. Available from: http://jpmtr.net/index.php/journal/article/view/6