Wastes included tars, powdered carbon and lampblack, which contain carcinogens.
From the sfgate.com
If the mortar is dark, a little lampblack can be added to the mix.
From the dailyherald.com
Records indicate that one of the essential components of lampblack ink was proteinaceous glue.
From the en.wikipedia.org
Lampblack was used to block up the slight spaces that remained.
From the en.wikipedia.org
The Pacific coast process has significant problems with lampblack.
From the en.wikipedia.org
The air has unhealthy levels of carbon black, also known as lampblack, for as much as a third of the year.
From the thenewstribune.com
Wastes contain lampblack, a finely powdered carbon, and thick, sticky tars containing cancer-causing compounds.
From the sfgate.com
Basic India ink is composed of a variety of fine soot known as lampblack, combined with water to form a liquid.
From the en.wikipedia.org
However, carnauba wax was added, as well as pine tar and lampblack resulting in a black, shiny, durable record.
From the en.wikipedia.org
More examples
Carbon black: a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink
Soot is a general term that refers to impure carbon particles resulting from the incomplete combustion of a hydrocarbon. ...
An amorphous form of carbon made from incompletely burned organic matter; used to make pigments and inks
A gray or black material made from soot obtained from the incomplete combustion of carbonaceous material used as a pigment to achieve a dull black ink with softer, grayer top tones and bluer undertones.
A black pigment composed of carbon from the soot of burning oil.