How long will my edge last before I will need to sharpen it?

Cangshan Q&A: How long will my edge last before I will need to sharpen it? ✅ Your Cangshan knife should keep its effective sharpness for 9 to 12 months with average daily use. This can be longer if you are honing your knife on a weekly or monthly basis. But ultimately, this will depend on how much the knife is used. You can use a piece of paper to test the sharpness of the full length of the edge to see if you need to hone or sharpen the edge.