So, I think whether it is 0.3 / 0.5 / 0.7 are easy to use, is to see how you like the kind of line. I use the cartridge is hb / 2b, I felt a very deep yet.
So it is, but I think it's easy to use no matter 0.3 / 0.5 / 0.7. It depends on what line you like. The refill I use is Hb / 2B, so I think it's very deep.<br>