Having arrived home, please excuse the late update; I continue to solicit monthly votes and sincerely ask for everyone's support regarding the issue of shelf life. At this moment, Elder Zhang sighed, "You should be aware that since such things are recorded in ancient texts, it means the ancients must have used this substance. The question is, why hasn't a single piece of work made with it survived?" "What natural disaster? Sure, it will destroy some works, but it couldn't possibly destroy all of them. Even some resin survived, let alone precious calligraphy and painting." As he spoke, Elder Zhang explained directly, "Ultimately, it's because this adhesive has volatility. After a period, the resin that melts the ink evaporates completely, and the work naturally reverts to its original state, losing that brilliant, dazzling effect." "I see," Wang Guan suddenly understood. Such an explanation was reasonable and logical; he felt it must be the true state of affairs. "Of course, compared to its merits, this minor flaw isn't a huge issue," Elder Zhang chuckled. "I estimate the shelf life isn't for millennia, but a few decades or a century should be no problem." Wang Guan blinked, then suddenly