How can you differentiate between Annealed Glass and Safety Glass?



Getting home interiors done is one of the tedious tasks. Especially when you want your home to look simple but elegant. I hired an interior designer who is helping me design my home in the simple and the best way possible. However, i am very particular about the safety aspect. We live with our parents, in-laws, brother’s family and kids. We wanted to have the designs elegant, simple and safe.

As a consumer i always had a question whether i should believe my interior designing vendor of the Safety Glass. How can i check and verify about the usage of safety glass? What are the parameters that i should look for to check safety glass? Here are a few tit-bits that can probably help:

There are 2 types of safety glasses.

1.    Toughened or Tempered which is strong and normally does not break but if it does break in extreme case, it will disintegrate into numerous small particles. These glasses are always marked with a non removable identification label. To identify, you may try to remove the label with a blade. You may pick a glass at random and try to break it intentionally to verify if it is toughened or not. The most common use of this type is in automobile side and back glasses.
2.    Laminated safety glass is a sandwich of 2 or more glasses with a plastic inter layer between the two panes. This type of safety glass tends to break more easily but it does not fall from the fixing as the plastic inter layer (most commonly PVB or poly vinyl butarayel) keeps the two glass panes strongly adhered to it. The most common use of this type is the automobile windscreens. The first look identification is by looking at the edge of the glass to notice two glasses and a thin plastic material. You may try to touch the plastic with a pin to feel the soft stretchable inter layer.


There is an Indian standard for this glass BIS 2553 part-1 and if the glass is marked with this ISI label, there is no need to look any further. Though all safety glasses are not ISI marked as of now but there is a proposal before the government to make this marking mandatory and then no safety glasses can be sold without BIS 2553 marking.


Location: India

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