Testing Molds For The Disks
To prevent instant disitegration in the water, the cacium carbonate disks need to be covered by a hard layer. Therefore, testing of different gradually disitegrating materials to incompass the disks occur often. Here, Doug Walker and Shaura Agarwal are melting the hardened solution to coat the disks.
P.S.- A pen ruined Mr.Walker's new shirt that day.