There is no difference in appearance between tempered glass and ordinary annealed glass.How to identify whether a piece of glass has been tempered?It can be distinguished from the state of the fragments formed by the rupture of a piece of glass:the formation of relatively small pieces of regular -ity is the general tempered glass;most of them are regular small pieces,and a small part of the central area is a relatively large piece,that is,regional tempered glass;In addition,it is not tempered glass.This method of identification is simple,but it has to destory the glass,can it not break the glass?That's also fine.
Tempered architectural glass and household glass are heat treated to be tempered,so they all have stress lines left by heat treatment,and the stress lines are usually invisible.Light reflection discriminatio -n using the sky outdoors or indoors using windows:Look at the light reflected from the glass or the window,and slowly change the angle of observation.If it is tempered glass,it may be seen that there is a column of blue-grey regular,dark middly,shallow and fuzzy circles,or elliptical,or long strips on the surface of the glass.However,only the stress pattern of some tempered glass can be seen directly by the naked eye.
When you see the stress pattern of the tempered glass,you can find a piece of polarizing plate(posit -ion of the lens when people usually wear glasses)and then observe the above method to see the stre -ss pattern of all the tempered glass.
