22. July 2014
This post is part of our “Tough as Glass” series.
Cooktops see a lot of action. These glass surfaces must survive extreme temperature fluxes, heavy pots and pans, and daily wear for decades. For those reasons, the test methods used to measure the strength of glass-ceramic closely resemble everyday situations. Glass-ceramic behaves differently depending on the shape and contact area of the impact item. Therefore cooktops are tested with a compact ball impactor and a flat pan impactor.
We’ve spent years in the lab running test after test to ensure the safest and most durable glass-ceramic cooktops on the market. But don’t take our word for it — see for yourself how world-class glass is tested:
1. Ball-drop impact test.
UL standards require all household ranges to pass ball-drop impact tests. For glass-ceramic cooktops, testers drop a 2-inch steel ball weighting 1.18 pounds from a height of 20.25 inches directly onto the cooktop surface. The glass-ceramic must withstand the impact of the ball without breaking and without experiencing line current leakage greater than 5.0 MA in order to make it to market. CERAN glass-ceramic cooktops not only withstand the UL ball-drop impact test, but maintain integrity at cooking temperatures up to 1120 degrees Fahrenheit.
2. Pan drop test.
Cooktops take a beating over their lifetime, but have to remain intact and ready to fire up despite years of dropped pots and pans. To simulate these real-world conditions, glass-ceramic cooktops must also withstand the pan drop test. In this test, cooktops must hold up after 10 impacts from a 4-pound pan, dropped from 6 inches above the cooktop. This test shows the durability of glass-ceramic cooktops under abusive cooking conditions.
These cooktops are built with the strength to last decades of cooking and cleaning day in and day out. While you shouldn’t try these tests at home in your own kitchen, you can see why glass-ceramic cooktops are able to last so long while looking so new.