Following The two substrates are bonded, either an ultraviolet (UV) beam is directed, or warmth or maybe a force is partly applied the sealant in between the initial and second substrates 510 and 520, for setting the sealant to fix the first and next substrates 510 and 520 (step 5S https://jiutustore.com/collections/optical-bonding-machine/Optical-Bonding-Machine