PERMANENT BLUE BLACK ( IRON GALL)

It’s recommended to write documents with this ink ONLY

The documents written with this ink can not be washed out with water or bleached with any acid or alkali.

They are really permanent. Light fast too.

The ink is iron gall type. When kept in an un used pen, this ink can corrode the metal ( That is Steel nib). NO PROBLEM FOR GOLD NIBS. I recommend to wash the pen at least in a week when using this ink continuously.

20160623_120256  The color of the shade change from Blue black to black.