First, you must understand that OCA is a special glue, it is softer than solid but harder than liquid LOCA glue, when using LOCA glue to refurbish the LCD we never have air bubbles, this is because air bubbles are easily removed from the liquid, but air cannot easily pass through the colloid. Why there is return bubbles? Do you think that after putting the air bubbles in the autoclave for about 5 minutes, do you actually remove all the air bubbles? The answer is no, the real process of removing the bubbles is to squeeze the air out of the OCA after lamination, maybe you don't see any bubbles after the bubbles are removed, but the fact is that the bubbles have been separated by a lot of tiny bubbles that you can't see with your eyes, but once those tiny bubbles come together after a few minutes or hours, they become tiny bubbles that you can see. How can this be avoided? 1, choose a good quality OCA, Mitsubishi is the most popular glue on the market today, it is very soft
Manual for Automatic OCA Film Laminator Machine...