1 It can use at least 15 years

2 If it is broken, glass will not drop from the film. It also doesn't generate glass powder, so it is impossible to hurt people. It is

much  safer than the ordinary glass.

Bisic manufacture theory:  heating and vacuum

At first, put the laminated glass into the vacuum bag, then put it into the furnace and vacuum.

It can put ture flower, true reed, silk, picture, marble paper, etc. inside the glass. The processing time is from 90-140 minute 

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