Thread: How hollow is a full hollow?

I have often wondered this and thought I'd post it here.

At what point do you consider a blade to be a full hollow? The nassrasur site seems to indicate that a full hollow should have that ridge that runs parallel to the blade, a half hollow being a similar grind without that ridge.

Now the henckels chart on the other hand just has a continuum and none of the images shows that ridge.

I ask because I often see people reference how different their full hollows can behave and I wonder if it is because we are calling everything that has a thin grind full hollow when in fact there is a big difference between a full and a half hollow even though they look very similar.

Thoughts? Idea?