Your film may be the tempered film. It is the problem of tempered film quality, there is no practical way to solve, only to chage a film. If you do not mind, it can also be used; or you can try to press it down by your nails, it can be used if it is pressed down without rebound . Generally, it will appear the white edge, that is not the full coverage of the tempered film. There is a gap between the four sides of full coverage of the tempered film and the screen, which is not called the white edge.
1, if it is a model film, the bubble in the corner is due to the dust, you can sticke out by the dedusting paster. If there is no dedusting paster, you can use the tape to stick it out. 2, if it is a universal membrane, there is a white edge in the cutting membranes, the reason is that the knife edge is not sharp enough to damage the adsorption layer. 3, the quality of the film itself.
It is the problem of tempered film quality, there is no practical way to solve, only to chage a film. If you do not mind, it can also be used; or you can try to press it down by your nails, it can be used if it is pressed down without rebound . Generally, it will appear the white edge, that is not the full coverage of the tempered film. There is a gap between the four sides of full coverage of the tempered film and the screen, which is not called the white edge.
