Noodler's Heart of Darkness (4.5oz Bottled Ink) with Free Charlie Pen
Noodler's Heart of Darkness is a popular permanent black fountain pen ink that comes in a 4.5oz bottle. The bottle has a built-in glass eyedropper so you can easily fill your eyedropper-convertible pens. This ink is popular for its very dark color and performance on absorbent paper, particularly its ability to resist bleed through and feathering. If you don't have a say in the quality of the paper you use, this ink is one of the best for you.