red lead
/'red'led/
Definition
- Noun:
- A reddish oxide of lead (Pb3O4): A chemical compound used primarily as a bright red or orange pigment in industrial applications.
Usage
- Primary Use: "Red lead" is used as a pigment and a corrosion inhibitor. It is commonly found in primers for iron and steel, and in the manufacture of glass and ceramics.
- Context: The term is technical and is used in contexts related to chemistry, painting, manufacturing, and historical art restoration.
Examples
- Noun:
- The old bridge was coated with a primer containing red lead to prevent rust.
- Art historians identified red lead in the pigment analysis of the Renaissance painting.
Advanced Usage
- "Red lead primer": A specific type of protective paint used on metal surfaces.
- Applying a red lead primer is an effective but now less common method for rust prevention.
Variants and Related Words
- Minium (n): Another name for red lead, used especially in chemistry and mineralogy.
- The mineral form of lead tetroxide is known as minium.
Synonyms
- Lead tetroxide: The systematic chemical name for the compound.
- Minium: The traditional name, often used in historical or geological contexts.
Notes on Meaning
- Caution: "Red lead" is toxic due to its lead content. Its use is now heavily restricted or banned in many countries for consumer products. The term specifically refers to the compound Pb₃O₄ and should not be confused with other red pigments like "red oxide" (iron oxide).
Noun
-
a reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramics
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