The year is 1727, the razor (Illustrated) is concave/hollowed.

In 1727, a french master Surgeon named Rene Jacques Croissant De Garengeot, wrote a book about surgical instrument. The book contains a description, how to use and maintain many different surgical instrument.
Attachment 142382

A section of the book is devoted to razors. He describe the razor as a knife like blade with a handle that pivots, its use to shave the beard and other area for preparation of surgery. Clearly explains every part of the razor, the edge, the back (spine) and how the delicate edge closes within the handle or scales.

The author explains that the blade relation between the edge and the spine is hollowed slighty with the help of a round grinding stone,
to create a finer edge from heel to toe. Furthermore his claims that the razor with that grinding (hollow) is easier to hone on the stone.
The discussin move to the dimensions of the razor witch is pretty close to what we know today. The materials used for the scales are tortoise shell, horn, and sometimes wood. Always proportioned to the blade usually around 6 inches. A nail used for pins and washer from silver or copper.

Next is honing the razor, and how to hold between the thumb and index finger, flat on the stone and never let the spine off the stone even when flipping the razor.

And finally the illustration of the razor, with its parts description.

Attachment 142383

Attachment 142384


C = The razor blade
D = The razor edge
E = The hollowing
F = The scales.

Good info as usual but is there any more on how to hold them while shaving?
I hold the tang between my thumb and index finger but it doesn't feel very secure!

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Originally Posted by Lemur

Good info as usual but is there any more on how to hold them while shaving?
I hold the tang between my thumb and index finger but it doesn't feel very secure!

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The grip he describe is the same as grip 1 from this link Different ways to hold a straight razor - Straight Razor Place Wiki

That's fascinating. I thought hollow ground razors originated in Sheffield but not until the mid or second half of the 19th Century. Clearly they were in use as medical instruments in France before then. I wonder if they also had distribution to barbers? They must have been more commonly known than we thought since barbers doubled as ships surgeons and dentists and they must have known of these razors. They would inevitably have fallen into British hands through naval engagements or even scientific meetings in Paris and been seen in Sheffield at some point.

Does anyone have any very early hollow ground blades? I've not knowingly seen one pre-1830's.

Martin -- you never fail to amaze me. There goes about 100 years of assumptions about blade grinding.

Not really Stimpy, even the heaviest W&B wedge blade had a hollow grind to it. it was just a very shallow hollow. Kind of like most politicians

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Originally Posted by Magpie

Not really Stimpy, even the heaviest W&B wedge blade had a hollow grind to it. it was just a very shallow hollow. Kind of like most politicians

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Well i do agree with your statement, but that not what we are talking about here, its +- 100 years before Wade & Butcher was even on the map!

Is it just me or does that blade look like it is convex, not concave?

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Originally Posted by souschefdude

Is it just me or does that blade look like it is convex, not concave?

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Not just you, the side facing us is drawn a little wrong at the toe.
Still better than my drawings! ;)

Now does anyone have one still???