i'm not sure but by using a certain grit of sandpaper longer and longer it does not increase the fineness of the grit. 600 grit is 600 pieces of "grit" per inch, you're not adding pieces of grit when you use it, you're just dulling those 600 pieces of grit. so to truly increase your grit and thus increase from grinding/sharpening to polishing you need to go to a higher grit, say 800 or 1200 that is new and thus has "sharp" pieces of cutting grit. then when you move to stropping you are using even finer "grit" BUT it's NEW GRIT, thus it cuts the metal even though it's a very small/fine cut. As you increase the # of grit the finer the cut gets and the more to the naked eye it looks like "polish". Put it under a micro scope and you'll still see it's a ragged edge. just an FYI.
The grit does get worn down. It's crystalline in nature and you wear off the edges of the of the crystals so that it's cutting power becomes less. The crystals become smoother and therefore do not cut as deeply.
i'm not sure but by using a certain grit of sandpaper longer and longer it does not increase the fineness of the grit. 600 grit is 600 pieces of "grit" per inch, you're not adding pieces of grit when you use it, you're just dulling those 600 pieces of grit. so to truly increase your grit and thus increase from grinding/sharpening to polishing you need to go to a higher grit, say 800 or 1200 that is new and thus has "sharp" pieces of cutting grit. then when you move to stropping you are using even finer "grit" BUT it's NEW GRIT, thus it cuts the metal even though it's a very small/fine cut. As you increase the # of grit the finer the cut gets and the more to the naked eye it looks like "polish". Put it under a micro scope and you'll still see it's a ragged edge. just an FYI.
The grit does get worn down. It's crystalline in nature and you wear off the edges of the of the crystals so that it's cutting power becomes less. The crystals become smoother and therefore do not cut as deeply.
There are two sizes of Tinker knives, which size do you use Chris?
The knife he used is a Swiss Army Tinker.
im not sure what model but i think its the swiss army tinker