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.

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 breakable portion.

The technology described herein relates to a system and device for saturating an absorbent wicking nib with at least two inks transferred from at least two ink donor structures, to provide a multicolor marker nib. In aspects, a wicking nib device is configured to orient the saturated marking nibs of two different-colored, saturated marker nibs directly adjacent opposing side portions of a porous wicking nib, such that the porous wicking nib simultaneously wicks ink from both contacted marker nibs to create a dual-color marking nib. The wicking nib device may include an aperture for viewing the wicking action.

The technology described herein relates to a system and device for saturating an absorbent wicking nib with at least two inks transferred from at least two ink donor structures, to provide a multicolor marker nib. In aspects, a wicking nib device is configured to orient the saturated marking nibs of two different-colored, saturated marker nibs directly adjacent opposing side portions of a porous wicking nib, such that the porous wicking nib simultaneously wicks ink from both contacted marker nibs to create a dual-color marking nib. The wicking nib device may include an aperture for viewing the wicking action.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A marking instrument having a plurality of removable writing nibs serially aligned so that an operator can remove a spent or fluid-affected writing nib and, thereby, access a fresh writing tip.

A writing felt pen including a barrel and a nib attached to the barrel, and a deformable pouch comprising a mix of absorbent polymer and fibres, an ink being absorbed in the absorbent polymer and the nib being in fluidic communication with the mix.

The present disclosure relates to a writing instrument comprising a tubular body, a reservoir for an ink composition. The writing instrument comprises a nib comprising a switchable flow material, wherein the switchable flow material is configured to switch between a fluid flow preventing condition and a fluid flow enabling condition by a stimulus. The switchable flow material is configured to control flow of the ink composition from the reservoir to or towards a writing surface.

The present disclosure relates to a writing instrument comprising a tubular body, a reservoir for an ink composition. The writing instrument comprises a nib comprising a switchable flow material, wherein the switchable flow material is configured to switch between a fluid flow preventing condition and a fluid flow enabling condition by a stimulus. The switchable flow material is configured to control flow of the ink composition from the reservoir to or towards a writing surface.