Editing Lead(II) oxide (section)

===Niche or declining uses===
A mixture of PbO with [[glycerine]] sets to a hard, waterproof [[cement]] that has been used to join the flat glass sides and bottoms of [[aquarium]]s, and was also once used to seal glass panels in window frames. It is a component of [[lead paint]]s.

PbO was one of the raw materials for [[century egg]]s, a type of [[Chinese cuisine|Chinese]] preserved [[Egg as food|egg]]. but it has been gradually replaced due to health problems. It was an unscrupulous practice in some small factories but it became rampant in [[China]] and forced many honest manufacturers to label their boxes "lead-free" after the scandal went mainstream in 2013.

In powdered tetragonal litharge form, it can be mixed with [[linseed oil]] and then boiled to create a weather-resistant [[sizing]] used in [[gilding]]. The litharge would give the sizing a dark red color that made the gold leaf appear warm and lustrous, while the linseed oil would impart adhesion and a flat durable binding surface.

PbO is used in certain [[condensation reaction]]s in [[organic synthesis]].<ref>{{OrgSynth| last=Corson |first=B. B. |year=1936 |title=1,4-Diphenylbutadiene |volume=16 |pages=28 |collvol=2 |collvolpages=229 |prep=CV2P0229}}</ref>

PbO is the input photoconductor in a video camera tube called the [[Plumbicon]].