'Ink' in the Bible

Then Baruch answered them, He pronounced all these words unto me with his mouth, and I wrote them with ink in the book.

Forasmuch as ye are manifestly declared to be the 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 fleshy tables of the heart.

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

I had many things to write, but I will not with ink and pen write unto thee: