The Blackest Black for Science and Art

An obsession with finding a shade darker than our language can effectively describe

How to make black printing ink: …An hundred pounds of nut or linseed oil being brought by boiling to the consistence of a syrup, and purified by throwing into it two pounds of coarse bread, and about a dozen onions: Then thirty or thirty five pounds of turpentine, are boiled apart, till such time as they find, upon its cooling on paper that it breaks clean like glass without pulverizing