Glass manufacturers every day to produce a lot of glass products, each product is very strict, glass end of step quality control, as long as there is a little problem by not, the problem of which there are many, including scratches,fingerprints, glass bubbles, scratches and fingerprints caused by the back glass bubbles are generated in the original film manufacturers. Glass bubbles can not be removed.
  The glass bubbles are glass in the production process due to the low melting temperature, melting caused by bad containing gas inclusions in the glass. Circular, oval, linear and punctate. It is a defect of the glass. In the process of production of the glass article, the process reasons. A piece of glass products containing bubbles is directly not through quality control, because the air bubbles contained in the inside of the glass. Can not be removed by other means. Such as a TV glass on a bubble that watching TV on the screen there will be a bright spot, the highlight is the glass bubbles will affect the visual, glass bubbles, it is directly thrown into the waste glass pool. Therefore, some good original glass is a glass bubble.