If you are having troubles making nice deep slashes, try using a #10 scalpel blade. It has a slightly rounded bottom and I have found it to be great in achieving nice smooth slashes. A client introduced me to the world of no knead bread, and I, in turn, introduced him to this method (and gave him a box of blades; the box will last him the rest of his life, loll. He is now a convert).

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