Hero 24 ink is not carbon ink, but dye ink, and its color is lighter than carbon ink.
Dye ink generally refers to water-soluble ink, but in fact, there are also solvent-based inks made of alcohol-soluble or oil-soluble dyes. Pigment ink is insoluble in water, and can only be used after ultrafine dispersion. The ink produced with pigment has a narrow color gamut and dark color, but the black ink is sharp, burr-free, waterproof and sun-resistant.
Extended information:
The main component of carbon ink is carbon (C), which is chemically stable at normal temperature and pressure and is not easy to react with other substances. Therefore, words written in carbon ink are easy to preserve and not easy to fade.
there are four common colors of ink: red, blue, black and blue-black. Red ink is generally used to correct homework, and it is used in a small scope. Blue-black ink is deep and solemn in color, not easy to fade and smooth in writing. It is a common ink used in people's study and work. Carbon ink is the most ideal black ink. Black ink is concentrated and shiny, and it is very eye-catching when written on paper. It is used to write pen words or pen calligraphy works, and the effect is the best.
Reference: Baidu Encyclopedia: Carbon Ink