It was interesting to read the posts regarding the sharpness of my knives. For the past eleven years, my knives have been the sharpest tools out of the box anywhere in the world. This also includes other specialized cutting tools such as microtome knives, scalpels, etc. This is a pretty bold statement, but one that I can back up with 25 years of making knives combined with sharpening anything and everything that has passed though the doors of my shop.
Eleven years ago I spent about six months of extensive trial and error research looking into what exactly is sharp. I discovered that the variables attached with this are enormous. Please allow me to make reference to just a few. First, the type of steel and its hardness. Second, the angle at which sharpening has been done. Third, whether the final finish of the edge is polished or comes from a stone (ceramic or natural). An issue also taken into consideration is the intended usage of the knife. If it is a culinary knife to be used for slicing soft materials such as meat and vegetables, then an aggressive edge is used. If the knife is to be a general-purpose pocketknife or field/survival knife, then a highly polished, less aggressive edge is used. The first will cut more efficiently on softer, slippery substances. The second will cut slightly less efficiently but much longer.
The ideal edge for a pocketknife or general purpose field/survival knife is the polished, convex edge.
The difference between the two types of edges is this; an aggressive edge has, as seen under magnification, a microscopic saw edge. These give aggressiveness in the cut but will break off in harder materials like wood, cardboard, etc. The polished edge is smooth and consistent and will cut much longer.
Both ways are what is termed sharp. I have had people pick up my knives at shows, run the edge over their fingernail and say that the knife is not sharp. The first thing I do is take the same knife, shave the hair off my arm and immediately they become confused. Testing a knife on a fingernail only tests for an aggressive edge.
Let me end this post by saying that this in no way is a put down to anyone, but an explanation of what is determined as sharp in the industry of cutting tools. We at Chris Reeve Knives value each and every SEBENZINISTA and their input. All posts are read everyday and your input is noted. This type of discourse is what this forum is all about. However, if anyone receives a knife that they are not happy with, please dont hesitate to call us. I want to know about it and I will be more than happy to speak with anyone who has concerns about our products. Give us the chance to rectify the problem before going to the Forum.
Thanks,
Chris