Lexington Gray ink in a Pilot 78G ‘F’ fountain pen, with a light watercolour wash, copied from a photo. After a while I started seeing double, trying to keeping track of which root was which.
This was drawn in a Daler Rowney Ebony A6 sketchbook which has 150gsm acid free cartridge paper. The fine ‘F’ nib on the fountain pen did start to break up the paper a little in the overworked darker areas, but this wasn’t really a problem. In fact the paper can take a light watercolour wash without bleeding through or buckling too much.