Caring for a High-Carbon Blade

High-carbon steel takes a keener edge than soft stainless and holds it far longer. The trade-off is that it wants attention. Not much — under a minute a day — but it is not a knife you can leave in the sink overnight.

Wash and dry immediately

Hand wash with warm water and a little dish soap, then dry it completely with a towel before it goes away. Water sitting on the blade is what causes spotting. Never put a high-carbon or Damascus knife in the dishwasher: the heat, the harsh detergent, and the knocking around against other cutlery will dull the edge and can crack a wood or resin handle.

Expect a patina, not rust

Over months, a high-carbon blade develops a grey-blue tint, especially where it meets acidic food. That is a patina, and it is a protective oxide layer — leave it. Orange, flaky spots are rust, and those are different: scrub gently with a paste of baking soda and water, dry, and check your drying habits.

Hone often, sharpen rarely

Honing realigns an edge that has rolled over; sharpening removes metal to create a new one. A few passes on a honing rod or a ceramic sharpener every week or two will keep a good knife cutting for months between real sharpenings.

Store it off the counter

Loose in a drawer, the edge bangs against everything else in there. A magnetic holder, a block, or an in-drawer tray keeps the edge off other metal and keeps the knife safe to reach for.