Once The two substrates are bonded, possibly an ultraviolet (UV) beam is directed, or warmth or possibly a strain is partly utilized the sealant between the main and next substrates 510 and 520, for placing the sealant to fix the primary and next substrates 510 and 520 (move 5S in https://jiutustore.com/collections/optical-bonding-machine/Optical-Bonding-Machine