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How Long Do Slice Ceramic Blades Last?

Our blades last longer than metal because they're made of harder material: 100 percent zirconium oxide. On the Mohs scale of hardness, zirconium oxide is harder than steel by several factors.

Mohs Scale of Hardness

Diagram illustrating the Mohs relative hardness scale shows that steel measures 4.5, while Slice ceramics are much harder, at 8.2.
Image 1. The Mohs scale is a standard method for comparing the hardness of various materials.

In general, once a blade is too dull it must be discarded. Our extremely hard ceramic blades retain their edge much longer than metal, which dulls quite quickly. How much longer will our blades retain their edge? According to an independent third-party test performed by the Cutlery and Allied Trades Association (CATRA) in December 2014, Slice ceramic blades last an average of 11.2 times longer than steel blades.

Slice Ceramic Blades Outlast Steel

Line graph shows the results of third party testing. Slice blades start out less sharp than steel but last much longer in the safe cutting zone between overly sharp and dangerously dull.
Image 2. This independent study by the Cutlery and Allied Trades Association demonstrates that Slice blades have a safer initial sharpness, and last much longer than relatively soft steel.

This means that every time you replace a Slice ceramic blade, you have already replaced an equivalent metal blade eleven times. Many of Slice's blades are double-edged as well which gives them twice the longevity. Slice ceramic blades' ability to retain sharpness gives them a much better value than traditional metal blades.

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