Any of various dyes that consist chiefly of the coupling product of diazotized paranitraniline and β-naphthol and are used in printing inks and paints.
Origin
Early 20th century; earliest use found in Journal of the Society of Dyers and Colourists.
Definition of para red in US English:
para red
(also para Red)
noun
Any of various dyes that consist chiefly of the coupling product of diazotized paranitraniline and β-naphthol and are used in printing inks and paints.
Origin
Early 20th century; earliest use found in Journal of the Society of Dyers and Colourists.