1- Since very few people now use fountain pens, the significance of ink on a physical level is no longer quite so valid. Formerly in dreams it suggested the ability to communicate in a lucid fashion. Il was also an instrument of ‘torture’ for children and would often appear in dreams in later life.
2- On a more intellectual level, ink signifies the ability to transcribe and understand knowledge in a more sophisticated way.
3- More spiritually, ink has significance, particularly in magical practices, when it was used to reflect powers which were outside the norm. In written magical spells it was necessary to use particular inks in order to achieve the required results.