Question

what is the principle of obtaining coloured components from blue /black ink

Answer 1

Answer:

Evaporation is a useful method to obtain coloured component (dye) from blue/black ink. Ink is a colloidal ( However, a colloidal solution usually refers to a liquid concoction solution) - a heterogeneous mixture of dye and water. When this mixture is heated, water evaporates and dye is left out.

Answer 2

Answer:

Chromatography

Explanation:

Above has one of important use to obtain coloured components from ink.