White lead

White lead is a toxic white pigment composed chiefly of basic lead carbonate. Its opacity and ease of use made it a major paint pigment before safer alternatives displaced it.

Basic lead carbonate: A lead carbonate compound, commonly written 2PbCO₃·Pb(OH)₂, that forms the main constituent of white lead pigment. This compound gives traditional white lead its characteristic pigment identity.
Ancient Greek technology: The tools, techniques, and practical knowledge developed in the Greek world of antiquity. Ancient Greek writers described methods for producing white lead.
Oil painting: A painting technique in which pigments are bound with drying oils such as linseed oil. White lead mixed readily with oil and contributed to flexible, durable paint films.
Occupational lead poisoning: Lead poisoning caused by exposure to lead during work, especially through inhalation or ingestion of contaminated dust. Pigment makers and painters faced repeated workplace exposure to white lead.
Dutch process: A traditional method of making white lead by exposing lead strips to acetic acid vapors and carbon dioxide. This layered corrosion process produced white lead on an industrial scale.
Theophrastus: A Greek philosopher and naturalist whose surviving works include early accounts of minerals and materials. His writings record an early description of preparing white lead.
Imprimatura: A thin, usually toned layer of paint applied over a ground to establish a painting's initial color. White lead could be used in preparatory layers and mixed into toned grounds.
Painter's colic: A historical name for severe abdominal illness associated with chronic lead exposure among painters and other workers. The condition was linked to occupational contact with lead pigments.
Lead(II) acetate: A soluble lead salt historically called sugar of lead, used in pigments and other applications. Acetic acid vapors generated this soluble lead compound during the Dutch process.
Pliny the Elder: A Roman author whose Natural History compiles information about the natural world and ancient technologies. He documented ancient production and uses of white lead.

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