Sharpening Stone Experiment

The idea is to use glass plates covered with sandpaper as sharpening stones. Glass plates provide flat surface and silicone carbide sandpaper becomes workhorse of this tool. The origins of idea came from my need to flatten my water stones. I had several options and both of them were not appealing
  • Metal plate covered with diamonds that seems to be durable but costs somewhere $60-$120. The durability is kind of unknown for me.
  • Flattening stones that run between $20-$80 for mystery synthetic stone. Not sure if need to buy several for each of my stone grits and durability is not guaranteed

I did not like my options and decided to go with my sharpening stone idea. Glass base will never warp and the sandpaper has durability and it is cheap enough (less than $0.25 per sheet) to be replaced frequently as needed.

The rest is history, but yet unfinished.


Sharpening stone idea is pictured on the right. We use glass base and cover it with silicone carbide sandpaper. The glass provides perfectly flat surface and silicone carbide sandpaper provides tough abrasive surface for any material processing. 
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In this video I started implementing the idea by creating test article. The tests proved that sandpaper attachment mechanism was finicky and needs to be replaced. Other than that everything went well until I decided to flatten big arch in one of my stones. The jig worked fine but I had to spend half an hour to correct 1/4" arch on the stone. This was amazing test of durability of sandpaper. Overall I learned a lot and ready to proceed to the next build.

For this project we used the silicon carbide 60 to 3000 Grit Sandpaper Assortment good for dry/ wet usage and available from amazon.


Glass Cutting became necessity and by chance I had perfect material, 0.25" thick broken glass from coffee table. I had an old glass cutter in my toolbox that was not been used for years. Somehow I managed to learn how to cut glass in one day and actually loved it. I think there is more glass cutting in my future and I might even buy some nice tools to do that.
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In this video I cut the base plates for sharpening stone experiment, have fun learning and make some beginners mistakes. This was humbling experience and I learned new skill. There was one more danger while cutting glass that was not in the video. Glass cutter creates fine shreds of glass particles that should not be cleaned by hand. In worst case scenario, those could be attached to your fingertips and if you scratch your eyes they can cause permanent damage. Brush your table and work piece carefully to control those and never touch your face when cutting glass. Following are my tools used during this video