Can ostrich 905 use hero ink?

You can't. When two different inks are used together, the colloid will sink and block the pen, so ostrich 905 can't be used with hero ink. Ink is a liquid containing pigments or dyes. Ink is used for writing or painting. The earliest inks were dyes made of metal, walnut shells or seeds, or inks made of aquatic animals such as fish and octopus.