In this video, Marcelo Bolinha Carnes shares his technique for sharpening a knife using a whetstone. He starts by cleaning a dull, old carbon steel knife with soap and steel wool, then uses a coarse side of the whetstone to sharpen the blade. He demonstrates the proper technique for holding the knife and applying pressure, and explains the importance of feeling the blade's roughness with the thumb. Once the blade is sharpened on the coarse side, he switches to the fine side of the whetstone to finish the sharpening process. Finally, he uses a honing steel to realign the blade's edges and demonstrates the sharpened knife's ability to cut through paper. The video is the first in a series on knife sharpening and features a step-by-step guide for viewers to follow at home.
Here are the key facts extracted from the text:
1. The video is about sharpening a knife.
2. The knife being sharpened is a carbon steel knife that was retrieved from an old box.
3. The knife was dull and had curled edges.
4. The whetstone used for sharpening has two sides: a coarse side (120 granulometry) and a fine side (320 granulometry).
5. The whetstone was obtained from a specialized shop.
6. The knife was cleaned with soap and water before sharpening.
7. A steel wool was used to further clean the knife.
8. The whetstone was used to sharpen the knife, starting with the coarse side.
9. The sharpening process involves moving the knife along the whetstone in a consistent motion.
10. The whetstone needs to be kept clean and dry to maintain its effectiveness.
11. The fine side of the whetstone was used to finish sharpening the knife.
12. The knife was honed using a honing steel after sharpening.
13. The honing steel was used to realign the edges of the knife.
14. The knife was tested by cutting a piece of paper to check its sharpness.
15. The video is the first in a series of videos about knife sharpening.