When tempering a glass containing Nickel Sulfide, this will cause the molecule to contract, and during the cooling process it will be "embedded" that way, so it could not return to its natural size. But it will always strive to return to its natural size. In extreme conditions of major differences between indoor and outdoor temperature such as a very hot day outside and a very conditioned room inside, or vice versa , it could happen that the molecule will succeed to expand back, and the result will be a glass breakage.
Although these are very rare occurrences, Phoenicia recommends these preventive actions:. The glass Phoenicia manufactures is sold in Israel and around the world, so Phoenicia is certified to manufacture glass according to Israeli and international standards that define the method and process of production, to minimize the possibility that this molecule will find its way into the glass. In addition, the production line is regularly monitored using sophisticated means, such as magnets and metal detectors, also even the facilities used in the production process do not contain the Nickel Sulfide molecule.
We in Phoenicia also increase caution and prevent the entry of materials that are not production related, but may find their way somehow to the raw material mixture. When that time comes, the glass will break slowly. Defective tempered glass is products that often have damages already.
Pre-existing cracks and scratches can often decrease the strength of the tempered glass. The impact can break it. For example, a glass balustrade, spandrel or overhead glazing that shatters and falls from its frame could cause significant injury if anyone happened to be unfortunate enough to be standing underneath it.
Even without the issue of safety, replacing toughened glass in inaccessible areas can be a major not to mention expensive inconvenience. This is known as spontaneous glass breakage and is, in actual fact, generally triggered by one of four factors:.
Minor damage during installation such as nicked or chipped edges that later develop into larger breaks. Overly tight binding of the glass in the frame, which causes stresses to develop as the glass expands and contracts due to thermal changes or deflects due to wind. While factors such as installation damage and incorrect fitting can be avoided to some degree by experienced glass technicians, avoiding glass that contains nickel sulphide is somewhat more difficult.
These inclusions are invisible to the naked eye and are almost impossible to completely avoid in the plate glass manufacturing process. The programme airs on Channel 5 every Thursday at 9. We know it's a hassle to switch browsers but we want your experience with CNA to be fast, secure and the best it can possibly be. To continue, upgrade to a supported browser or, for the finest experience, download the mobile app. Main navigation Top Stories. CNA Insider When glass suddenly shatters — why it happens and how to be on the safe side.
Bookmark Bookmark Share. Close Top Stories. CNA Insider When glass suddenly shatters — why it happens and how to be on the safe side There have been cases at home, and outside too; over the past decade, at least exterior glass panels were reported to have shattered. The danger is that all it takes is a few drops of water for this to happen. Arulnathan John. Chan Luo Er. Joshua Lim posted this on social media. Dr Leonard Loh has spent a decade studying glass and its properties.
Does your glassware have micro-cracks or small chips? It can shatter the whole glass. Mr Don Tay has installed more than 1, glass panels in the last five years.
When his workers handle glass panels, they never place the edges directly on any hard surface. A replacement panel on a balcony. Can you tell if the installation was done well? No video provider was found to handle the given URL.
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