The Pelikan Twist rollerball pen is a durable and well-made pen, designed to withstand regular use. However, like any pen, it can eventually wear out or become damaged with heavy use over time. With proper care and maintenance, the Twist rollerball pen can have a long lifespan. However, if it is subjected to extreme conditions or misuse, it may eventually become unusable. **

The rollerball may write extremely light after changing the cartridge because the new cartridge may not be fully inserted or properly aligned in the pen. This can cause the ink flow to be restricted, resulting in lighter writing. Additionally, air bubbles may have formed in the new cartridge, preventing the ink from flowing smoothly. It is important to ensure that the cartridge is securely in place and to gently tap the pen on a surface to help remove any air bubbles and improve the ink flow. **

Yes, the cap is missing from the Schneider Blauer Engel rollerball pen. **

The rollerball pen may write extremely lightly after changing the cartridge because the new cartridge may not be fully saturated with ink yet. It may take some time for the ink to flow smoothly and consistently onto the paper. Additionally, there could be air bubbles trapped in the cartridge or feed system, causing the ink to not flow properly. It is recommended to gently tap the pen on a piece of paper or let it sit for a few minutes to allow the ink to flow and the pen to write more smoothly. **

To remove a blue ink stain from a rollerball pen, you can try using rubbing alcohol or nail polish remover on a cotton ball or cloth. Gently dab the stained area with the solution until the ink starts to lift. You may need to repeat this process a few times until the stain is completely removed. Remember to test the solution on a small, inconspicuous area of the pen first to ensure it does not damage the material. **

I write with a rollerball pen. I find rollerball pens to be smoother and more consistent in their ink flow compared to fountain pens. Additionally, rollerball pens are more convenient for everyday use as they do not require frequent refilling or maintenance like fountain pens. Overall, I prefer the practicality and reliability of a rollerball pen for my writing needs. **

One option to consider is the Pilot FriXion Clicker Retractable Erasable Gel Pen. This pen uses thermo-sensitive gel ink that can be erased with the built-in eraser tip. Another option is the Uni-ball Signo TSI Erasable Gel Pen, which also uses thermo-sensitive ink that can be erased with the attached eraser. Both of these pens offer the convenience of being able to erase mistakes without needing to use correction fluid or tape. **

You can find affordable engagement ring designs at various jewelry stores, both online and in-person. Many retailers offer a range of options at different price points, so it's worth shopping around to find a design that fits your budget. You can also consider looking at vintage or second-hand jewelry stores, as they often have unique and affordable options. Additionally, some jewelry designers offer custom designs at more affordable prices, so it's worth reaching out to see if they can create a ring within your budget. **