Due to particular formulation - metallic colors require single nibs
Alcohol-based ink produces vivid color yet has a minimal odor
Rich saturation with smooth and silky flow of color
Nontoxic - dye-based ink that draws from a single ink reservoir
Highly permanent, opaque, waterproof and lightfast metallic ink. Writes on practically any surface. Metallic colors will darken over time when exposed to light.