Hacker News
- Finding the Darkest Pencil https://unsharpen.com/darkest-pencil/ 37 comments
- Uni-Ball Develops the First Paper Pen Refill https://unsharpen.com/uni-ball-develops-the-first-paper-pen-refill/ 5 comments
- Paper Sizes Explained https://unsharpen.com/paper-sizes/ 3 comments
- What Is the Transparent Material at the End of a Gel Pen Refill? https://unsharpen.com/follower-end-of-gel-pen-refill/ 46 comments
- Rollerball Pens of 2021 https://unsharpen.com/best-rollerball-pen/ 125 comments
- Rollerball pens that use fountain pen ink https://unsharpen.com/rollerball-pen-fountain-pen-ink/ 110 comments
- Pen Refills Guide https://unsharpen.com/pen-refill-guide/ 56 comments