How to sharpen sketch charcoal? It always breaks down. Is there any good way to recommend it?

The charcoal pen in the first sketch is used correctly without sharpening. People who use the right method never need to sharpen, but get different thick and thin lines by changing the angle of use.

Second, if you can't master the correct brushwork, you must sharpen it. You need to do the following.

First, when sharpening a pen, the pen moves instead of the knife. Hold the pen with the middle finger of the left hand, put the knife on the pen with the right hand, and hold it back with the thumb of the left hand. Then use your fingers, middle fingers and ring fingers to pull the pen towards your body, and use your thumb to push the knife outward. Pay attention to stability, don't use your right hand, just take the knife and adjust the angle. Most pen tips will break when the right hand is forced)

If you use your right hand to cut with a knife, the nib will be unevenly stressed and will definitely break.

Second, cut the wood part first, not the charcoal part, and try to keep the integrity of the refill.

Third, after the exposed length of the refill meets your needs (5-7mm is recommended), stand the nib on the desktop, and then scrape and trim the nib from top to bottom with a knife.

Fourth, when scraping the nib, you can't cut it in place at one time, but you can get a sharp nib after many times.

Supplement: Don't use a pencil sharpener (the pencil sharpener mentioned upstairs). It can sharpen pencils and charcoal pens. The more you sharpen, the better. You can't waste it.

I advise you not to trim it too much. It's no use. Charcoal painting will soon be boring.

Learning to change the angle to get thinner lines is the best policy.