Specification of Kaca Tempered / Sight Glass ( Klinger )
Tempered glass is ordinary float glass which has been strengthened by heating to a certain boiling point (around 700'C) then cooled suddenly with bursts of cold air on both sides, so that there will be changes in the tensile and compressive forces of the glass.
The process of tempering or tempering takes not too long (depending on the thickness of the glass), but what takes a long time is the pre-process or the process before tempering such as cutting (cutting), perforating (drilling), or rubbing (edging). In addition, the queue of tempered processes at the processor also sometimes takes a long time so that the total tempered glass process can reach one week.
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