The Nakaya Piccolo Writer Kuro-tamenuri (or Kurotame) has black (Kuro) urushi over the red shu urushi base which you can see peaking through in places where the pen makers have polished the black urushi away. The Nakaya website describes the process and provides some definitions:

"Tame" means "pool" and "nuri" refers to the lacquer coating process. You can actually see through the layers of clear urushi lacquer as if you were looking into a pool. Wajima artists use "shu urushi" (red color) for the base urushi on the barrel, and "shu-ai-urushi" (mixtures of red and clear lacquer) for the finish coats. When the process is finished, you can still see the base surface of red urushi. After this coating process, craftsmen polish the surface over and over by hand for months in order to attain greater transparency, allowing you to clearly see the underlying red usurshi surface.

The Nakaya Piccolo Writer's urushi finish feels smooth but feels quite hard to the touch. It's a reflective surface and it does attract fingerprints somewhat easily. The red of the lower layer of the urushi, especially where the barrel and the cap meet, it's beautifully subtle and very successfully breaks up the simple black cigar shaped pen that would otherwise look uninspiring (to me). The pen material is ebonite below the urushi finish.