'Ink' in the Bible

being made manifest that ye are an epistle of Christ, ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in tables that are hearts of flesh.

Having many things to write unto you, I would not write them with paper and ink: but I hope to come unto you, and to speak face to face, that your joy may be made full.

I had many things to write unto thee, but I am unwilling to write them to thee with ink and pen: