|The Stainless No. 8 and The Carbon No. 9|
Carbon blades require more attention than stainless steel blades as they are more prone to rust if not taken care of properly. One unique feature is that they patina as you use them. It's a chemical reaction that changes the color of the steel and adds a protective layer to the steel. But to me that is not the reason, patina simply is aesthetically appealing and full of character. Some like a uniform patina or a man made design but that's not for me. I prefer a random pattern. It's like a poor man's case coloring.
Many force patinas by stabbing their knives in a potato or wrapping a vinegar drenched paper towel around the blade or covering the blade in mustard for an hour or two. I debated if I wanted to force a patina or to just allow it to happen naturally. I spent a first few days using the knife for normal kitchen duties and it slowly created some patina. I grew impatient and grabbed a lemon and stabbed it with the blade and kept it there for over an hour. The blade has now starting to build some character and will improve with age. I'm digging the carbon so much I imagine the No.8 will not get much use anymore.