Bubbles because the following two situations: First, due to uneven force, the air is not completely ruled out, then lift to the middle layer to the position of bubbles with a clean cloth or a small scraping gently bubbles out of the can; Second, because the screen is tiny dust particles above a residual lint, (middle layer occasionally adsorption in the air suspended particles).

If this is the case as the first tear ① affixed to the surface of the protective layer, the adhesion work pauses, with adhesive tape that side will be gently fluff, particles stick out (sticky tape than large gravity adsorption layer). Then continue attached for hair removal floc particle tape can only be used once, the next time when the need arises to re-tape volumes from the tape to tear out. The edge of the foil to the final caution, the most prone to bubbles. This step is try not to use the card and wipe scraping, try to use both hands pressed obliquely protective film, the film slowly adsorption up, try to ensure that no air bubbles middle portion, the edge portion do not worry, and so on up the entire film are then adsorbed processing edge portion of the bubble, this time with a small blade gently expel the air.