Hold a straightedge to it. It's not curved. The question about the effective contribution of the expanding gap to the oblique shaving angle remains.It appears straight to the naked eye, but I do not believe it is.
Hold a straightedge to it. It's not curved. The question about the effective contribution of the expanding gap to the oblique shaving angle remains.It appears straight to the naked eye, but I do not believe it is.
Hold a straightedge to it. It's not curved. The question about the effective contribution of the expanding gap to the oblique shaving angle remains.
It's not clear if this is a thought experiment or the result of actual measurement. When I hold a single edge blade perpendicular to a DE blade mounted in my Merkur Slant, right at the DE's edge, no light is visible between the two blades at any point along their length. So even if the geometry implies some curvature it it not measurable.See my added explanation and edit.