Jamie Buxton
10-09-2007, 10:33 PM
You can make a scraper from a piece of glass. A freshly-broken edge scrapes pretty much like a steel scraper. The first pic below is a broken piece of food jar. The second is that piece of glass pulling shavings off a board. (I'm not photoshopping you. Try it if you don't believe me.)
I don't understand how this scraper actually cuts. Scrapers have a burr, which makes a cutting edge to cut into the wood fibers. The third pic below is a diagram from Leonard Lee's fine book on sharpening, and it shows the burr cutting into the wood.
As far as I can see, the glass scraper has no cutting edge. There is a sharp edge formed by the break, but it has no burr. In fact, I was dragging it backwards across the wood to make the shavings in the picture.
So, can anybody explain to me how the glass scraper works?
I don't understand how this scraper actually cuts. Scrapers have a burr, which makes a cutting edge to cut into the wood fibers. The third pic below is a diagram from Leonard Lee's fine book on sharpening, and it shows the burr cutting into the wood.
As far as I can see, the glass scraper has no cutting edge. There is a sharp edge formed by the break, but it has no burr. In fact, I was dragging it backwards across the wood to make the shavings in the picture.
So, can anybody explain to me how the glass scraper works?