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I'm probably not going to tape any of the razors I currently have, because (a) I'm lazy, (b) none of them are showpieces, and (c) they all have very narrow bevels which I don't want to make narrower....

Well...EVENTUALLY you will have a pocket knife, but not "pretty soon." Have you experienced how much work it takes to hone out even the smallest nicks? Grinding away about 1/3 of the blade will...

Before you get converted by my math, double-check it to make sure it's correct!:rofl2: These conclusions surprised me as much as they surprised you. Before this I had assumed that taping was bad...

Maybe so. These are approximate calculations. I wouldn't swear in court that 14 deg. and 20 deg. are the exact right numbers. Other members (like yourself) are welcome to make refinements :rock:

No. I am saying that you are wearing away the edge but not the spine, thus making the angle more obtuse. I am calculating how this will affect the lifespan of the razor. I conclude that you will have...

Substituting eq.2 into eq.1, we can solve for the amount of height which has been ground away by the time the razor reaches 10 degrees, which is the point at which it is trashed.

Conclusion: for...

Next, let's assume that the razor leaves the factory with a 14 degree edge, and that it ceases to function as a razor when it hits 20 degrees. So we'll set theta[0] and theta[1] to 7 and 10...

And here is the equation:

First, we solve for the amount of height that we have ground away over the years:

This is what mathematicians do when they're bored. I wouldn't swear in court that there are no mistakes here, but this is my first stab at a theoretical approach to spine taping.

Suppose a razor...