This is one method. You can also modify the angle from 90 to 45.
As has been mentioned you can also run your thumb "along" the length of the edge, very lightly. I use both the 45 degree and along the edge.
[quote=joshearl][quote=mparker762]I think the traditional thumb test is lightly dragging your thumb at right angles to the blade (not parallel or you'll get cut). A sharp edge will kind of catch as your thumb goes across it.Quote:
So if I'm reading this right, I should do the following:
1. Lay the razor on its spine, edge pointing up.
2. Wet my thumb.
3. Drag the pad of my thumb across the edge at a 90-degree angle to the edge and a 90-degree angle to the blade. Like this cutaway view:
-----------------> (motion of thumb)
| (edge)
|
||
||| (spine)
Sorry for the bad ASCI art. It's my first attempt.
Thanks,
Josh