grinding material must be harder than the material of the knife blade.)

As a rule, butcher's knives are sharpened briefly before use and several times a day during use. Depending on personal preference and availability or the respective operational practice, other sharpening aids or knife sharpeners are sometimes used. Over time, the "basic grind" wears off, so that simply aligning the edge on the sharpener is no longer sufficient to achieve the desired sharpness. According to expert recommendations, the knives should then be resharpened