Inking

In a rotary printing-machine, a cylinder carrying a single relief design, means for imparting successive complete inkings to said design […]

Mucus-rich ink is supposedly a dangerous or annoying substance that interferes with fish gills and some cephalopods react adversely to their own inkings in small containers or in the lab. The blue-ringed octopus Hapalochlaena lunulata has tetrodotoxin, the deadly toxin it also releases in a bite, in their ink but the concentrations and effect in inking are not known.