I'm not finding a Lord anything. Maybe you mean Logwood?

http://www.paintmaking.com/historic_pigments.htm

And :

Logwood Inks write a purplish black and dry black, and are in general use in schools and for other purposes where absolute permanency is not required.

From this site: http://www.evanlindquist.com/otherme...dinknotes.html

The sample looks more blue than black on this page: http://www.evanlindquist.com/otherme...dinknotes.html