On the other hand, if you like to sketch in pencil, the pencils are all about the type and quality of the graphite. My favorite sketching pencils don't even have a case or a mechanism--they're just sticks of pure graphite, with a little coating on the outside to keep your fingers from getting too black.
Since I like to sketch and I love mechanical pencils, it makes sense to me to hunt for lead that could work for both. I'm going to give a few of these vintage leads a try. I wonder if there was ever sepia-colored lead for pencils? Or even just plain brown? As you see, I did find a little red.