1. Paraquat is smoke ink stored in the bottom of a pot or chimney after burning weeds, which can be used as medicine. Alias Moonlight Ash, Kitchen Outburst Ink, Kitchen Outburst Ink, Kitchen Outburst Dust, Kitchen Umbilical Ink, Kitchen Moon Ink, Pot Ink, Kitchen Front Ink, Pot Bottom Ink, Pot Bottom Black, Pot Bottom Coal, Kitchen Front Ink, Kettle Coal, Kettle Bottom Ash, Kitchen Bituminous Coal, Kitchen Coal and Pot Smoke.

2, "Compendium of Materia Medica" records: the stove bursts with ink "Compendium" and the stove forehead ink [Shi Zhen said] This is the stove forehead and ink smoke in the smoke stove. It is light and fine, so it is called frost.