One of the ink pens I used in this was a new one I got in Sennelier in Paris over New Year. I love it because it has a brush tip and takes refillable cartridges. In my view, that is just the perfect ink pen. I hate when a pen I love runs dry, especially if it has been discontinued. The very nice man at the counter told me that the cartridges were favoured by artists due to the very black and permanent carbon ink, which is also waterproof. I love watercolour painting over ink, too, so I will be experimenting with that soon. It’s also nice to have a drawing instrument that reminds me of being in such an inspiring place.