How to solve the problem that the tip of the sharpened pencil is uneven or has burrs?

1. Check the sharpening tools
Is the blade or the sharpener sharp? A blunt blade can easily cause sawdust or lead to tearing, resulting in burrs.

Solution: Replace the sharpener blade, or use a sharper one.

Is the sharpener aperture matched? An aperture that is too large may cause the pencil to be unstable and produce an uneven tip.

Solution: Choose a sharpener that matches the pencil diameter.

2. Correct sharpening method
Manual sharpening (with a knife):

Keep the blade at an angle of about 15°~20° to the pencil, and cut evenly in the direction of the tip to avoid reverse force that may cause the lead to break.

Rotate the pencil and sharpen it gently multiple times, rather than all at once.

Using a sharpener:

Make sure the pencil is inserted to the bottom and rotates at a constant speed to avoid pauses in the middle that may cause stepped burrs.

3. Dealing with lead burrs
Sandpaper polishing: Use fine sandpaper (600 grit or above) to gently polish the tip of the pencil to remove burrs and trim the shape.

Nail file alternative: If sandpaper is not available, use the fine side of a nail file to grind the lead in one direction.

4. Pencil quality factors
The lead is too hard or brittle: The lead of a low-quality pencil may break when sharpened.

Recommendation: Choose a well-known brand (such as Mitsubishi, Faber-Castell) or a pencil marked "anti-break".

5. Environment and storage
Humid environment: Wood tends to stick together after being damp, and burrs are generated when sharpening.

Solution: Store pencils in a dry place, or wipe the surface before sharpening.

6. Quick emergency treatment
Wipe with paper: Scrape the tip of the pen with a piece of hard paper (such as the edge of a note paper) to remove small burrs.

Light flames: Quickly sweep the tip of the pen with a lighter (be careful) to burn off the remaining wood fibers.