2. Pencil hardness: Pencil hardness directly affects the comfort of writing. Generally speaking, H level is hard and suitable for daily writing; B is soft and suitable for painting.
3. Pen body material: high-quality carbon pens are usually made of metal or plastic, and the metal pen body has good texture but heavy weight; Plastic pen body is lighter, but it may affect the writing experience.
4. Ink capacity: The greater the ink capacity, the longer the use time. When choosing, you can choose the appropriate ink capacity according to your own needs.
5. Brand and price: Choose carbon pens of well-known brands, and the quality and after-sales service are relatively guaranteed. At the same time, we should choose the appropriate price range according to our own budget.
6. Trial experience: You can try it before buying, and feel the writing feel of the nib, the fluency of the ink and the comfort of the pen body.
7. Packaging and accessories: High-quality carbon pens usually have exquisite packaging boxes and corresponding accessories, such as pen covers and ink bottles. Pay attention to these details when buying.
8. User evaluation: Looking at the evaluation and feedback of other users and understanding the actual use of the product will help you make a better choice.