Quote Originally Posted by Bruno View Post
If that is a paperweight, I'll give you 10$ for it
If you hone with tape, you wouldn't notice this.
If you hone without tape, you'll get that line back. The demarcation is gone because it is ever so slightly rounded. Put it on the hone and it will be back. And as Glen said, from a honing pov, it doesn't change anything.

Now, in the interest of disclosure, it was me who wrote that document. I didn't have a razor like yours (I.e. with a wide spine), just the standard designs. However, the document says to sand the blade, not to sand the spine and the blade together, erasing the geometry. Btw, if you sand like that, the direction is edge to spine, and then when you pull back, edge to spine. Back and forth. Nowehere does it say that you sand OVER the spine demarcation line.

I would think that it is obvious that spine to edge, edge to spine refers to the direction. It doesn't tell you that you should sand away the spine itself. Just like a north-south route doesn't run from the north pole to the south pole.
There are any number of sayings in American English that are pertinent to this discussion; one which is well-known teaches that "An ounce of prevention is worth a pound of cure." Another says that "A picture is worth a thousand words." But my favorite is this one: "Never assume -- when you do, it makes an ass out of u and me."