Can Toothpaste Really Sharpen a Knife?
Toothpaste is often used as a polishing agent for metal objects. This is due to its main ingredient, fluoride, which helps to polish metal and etch glass.
In addition, toothpaste contains a mild abrasive agent (RDA) that softens and removes rust from knife blades, making them significantly sharper.
![](https://media.phunutoday.vn/files/content/2025/02/01/boi-kem-danh-rang-tren-dao-1032.jpg)
How to Sharpen a Knife with Toothpaste
Here’s what you’ll need:
– Toothpaste
– Cloth
– Salt
– Ceramic plate.
Step-by-step Guide:
Step 1: Apply toothpaste to the front of the knife blade. Use a clean cloth to spread it evenly on both sides of the blade.
Step 2: Take a ceramic plate and turn it upside down. Mix one spoon each of salt and white vinegar at the bottom of the plate and spread it evenly.
![](https://media.phunutoday.vn/files/content/2025/02/01/boi-kem-danh-rang-tren-dao1-1033.jpg)
Step 3: Place the toothpaste-coated knife on the plate, tilt it at a 25-degree angle, and gently pull it downwards.
Step 4: Spend about 5 minutes on each side of the blade, and your knife will be as sharp as new.
If you don’t have a knife sharpener at home, you can use this handy trick to sharpen and polish your knife using just toothpaste and a ceramic plate or bowl.