It seems that we on this forum are of a difference about what is a wedge grind, 1/4 hollow 1/2 hollow etc. It would benefit us all if a common standard could be developed and/ or referred to, i.e. Razor Central. I have seen wedges described as only those razors with no concave grind to them at all or as razors with a single concave grind.
There is also some confusion as to what is a 1/4 hollow, 1/2 hollow etc.

From the reading I have done of the Razor Central pdf manual my understanding of a wedge is a single concave grind that extends all the way to the edge. However, one of the gif's shows a wedge as having no concave grind at all, but then it is a small gif. That same gif shows a 1/4 and a 1/2 hollow grind as having a single concave grind starting at the spine and extending down to 3/4 or 1/2 of the blades width respectively.
The bottom 1/4 is a single thickness on the 1/4 hollow grind and the bottom 1/2 is a single thickness on the 1/2 hollow grind.

However, if you continue reading that document where the process of grinding a bi-concave (full hollow) razor is described then some confusion occurs. There it refers to some razors as 1/4 hollow and 1/2 hollow.

My understanding is that a wedge can be either a pure flat grind with no concave or a single concave grind that extends all the way to the edge.

A 1/4 hollow grind is a single concave grind where the concave portion extends from the spine down 3/4 of the width of the blade with the bottom 1/4 being of a single thickness.

A 1/2 hollow grind is a single concave grind where the concave portion extends from the spine down 1/2 of the width of the blade with the bottom 1/2 being of a single thickness.


Can we develop/agree on a standard for reference and common agreement?