• I use so-called “eternal pencils” now. They come in various “hardness” ratings (like pencils: B, HB, H, 2H, etc.) but even my “softest” (read: darkest with broadest tip) has been in use now for a couple of years without noticeable wear on the tip. That one is guaranteed to be usable for a decade. My hardest will likely stop working when the sun dies in four billion years or so.