Writing instruments may include nibs having voids for viewing a writing surface when in use. The nib includes a fibrous nib body with an upper writing portion and a lower portion configured to deliver ink from an ink reservoir to the upper writing portion. The nib has one or more elongated beams that defines a void in a two-dimensional plane through which a writing surface can be viewed when in use.

Writing instruments may include nibs having voids for viewing a writing surface when in use. The nib includes a fibrous nib body with an upper writing portion and a lower portion configured to deliver ink from an ink reservoir to the upper writing portion. The nib has one or more elongated beams that defines a void in a two-dimensional plane through which a writing surface can be viewed when in use.

This disclosure describes systems, methods, and devices related to enhanced gradient marker. A device may comprise a marker housing. The device may an ink retardant nib having a marker tip, wherein the ink retardant nib restricts flow of ink, and wherein the ink retardant nib comprises a tapered end designed to be inserted in the marker housing. The device may an ink retardant nib head shaped to provide ink application through a barrier.

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a water-soluble film.

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a water-soluble film.

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a breakable portion.

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a breakable portion.

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a water-soluble film.

A nib for a refillable free ink writing felt pen includes a body and a dry ink tank including dry ink, the dry ink tank being delimited by the body of the nib and a dry ink tank wall including a water-soluble film.

A nib for a valve-free free ink writing felt pen including a first end configured to deliver ink to a writing support and second end, opposite the first end, configured to be inserted in a nib receiving part of the valve-free free ink writing felt pen, the first end and the second end defining an axial direction of the nib, the nib having an external surface configured to cooperate with an internal surface of the nib receiving part, the external surface being configured to allow intake of air from the outside of a free ink tank, the valve-free free ink writing felt pen into the free ink tank and avoid ink leakage outside the free ink tank when cooperating with the internal surface of the nib receiving part. A valve-free free ink writing felt pen including a nib.